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Five hot fantasy baseball waiver wire pickups, streamers, and sleepers for Week 13 (2026). Undervalued hitters outperforming their ownership percentage and should be more widely owned.
Welcome, RotoBallers, to another edition of our Bargain Basement Hitters for Week 13 of the fantasy baseball season. As always, we will spotlight some surging hitters who are widely available across all Yahoo leagues.
This week, we will look at a middle infielder who has flashed five-category potential and two veteran hitters in Minnesota who have found their footing. All players referenced in this piece are rostered in fewer than 25% of all Yahoo leagues.
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Trevor Larnach, OF, Minnesota Twins
5% rostered (Yahoo)
Starting this week's list is a six-year MLB veteran in Minnesota. Larnach has held value in deep leagues throughout his career but is on track to enjoy one of the most impressive MLB seasons to date. During the 2025 campaign, the outfielder launched a career-high 17 home runs with a modest .250 AVG and four stolen bases.
While he has only hit five home runs to date (through 65 games), Larnach is showing a much stronger approach at the dish. So far, he has held strong with a .280 AVG with two stolen bases, which puts him on pace to surpass his previous high of four swiped bags.
What has put him in this week's column is his stellar play since the start of June. Since June 7 (his last 12 games), Larnach has quietly posted a stellar .375/.419/.600 slash line with three doubles, two home runs, and a 5:2 K:BB. While he only has seven long balls on his yearly total, it appears the slugger is beginning to tap into his raw power.
Is this recent surge the sign of a late-career breakout?
When looking at his underlying metrics, Larnach has nearly all of the skills we have looked for throughout this column this season. First, the Oregon State product has drastically lowered his strikeout rate, boosting his value in points leagues that penalize high-whiff hitters. Currently, he holds an 18.5% K% (67th percentile), which is on pace to be the best of his career by a wide margin.
In comparison, last summer, he held a 21.5% K%, and the previous year, a 22.3% K%. Seeing him improve in this metric is a positive sign.
Additionally, his .256 xBA (59th percentile) and .333 xwOBA (62nd percentile) are both higher than his 2025 marks and suggest his rise in batting average this season is backed by an underlying mark, even if the .280 BA were to slightly drop over the second half.
However, the one component of his profile that caught my eye is the rise in Pull AIR%. This is a statistic I have highlighted in this column many times, as it is a direct indicator of an applicant's pure home-run upside. If a hitter can hit the ball hard but is not optimizing his swing, the power totals will not show up in the box score (like Fernando Tatis Jr.).
Fortunately, Larnach is optimizing his swing. Through the opening months, he has generated a 22.8% Pull AIR%, which is not only well above the average marks but also a six-point jump from his 2025 rate. Even though his hard-hit rate has dropped slightly this season, his barrel rate (7.0%) has remained in line with career norms, but he has begun to impact the ball effectively.
This positive regression has already begun to show in his June box scores and suggests even better days are ahead. With a rise in batting average, lower whiff rates, and a more optimized swing for power, Larnach may not only push for his first 20-HR season but also do so with a career-best batting average.
Andres Gimenez, 2B/SS, Toronto Blue Jays
15% rostered
Let's shift our attention to the middle infield position. Andres Gimenez was once a high-end shortstop in 2022, when he not only made the American League All-Star team but also posted a .297 AVG with a near-20/20 finish, hitting 17 home runs and stealing 20 bases.
The following two seasons, Gimenez would see his average drop (.252) and see his speed surge (30 SB average) while his power took a slight drop (hitting just 12 home runs per season). In 2025, Gimenez would have the worst season of his MLB career, posting a .210 AVG with just seven home runs and 12 stolen bases.
As a result, Gimenez was nothing more than a deep-league flier to potentially push for a 10/20 season in his new home in Toronto. However, Gimenez is not only enjoying the recent surge at the dish but is also nearly matching his production from the 2025 campaign. Through 75 games, he has hit seven home runs and swiped 10 bags with a .234 AVG, putting him on 20/20 watch.
Since June 1 (his last 19 games), Gimenez has hit .293/.33/.431 line with one home run and four stolen bases. While three of these stolen bases came in just one game, seeing him begin to receive the coaching staff's green light is a positive sign.
As shown in the visual below, Gimenez has seen his xwOBA increase again across all three pitch-types over the past two months and especially in June. While he is overperforming his production against fastballs in June (.410 wOBA - .327 xwOBA), his general profile has improved over the course of the season, especially when looking at his productivity against breaking and offspeed pitches back in April.
While he is performing much better in the box score, managers should expect a massive step back. Currently, the 27-year-old holds a low .225 xBA with a 24.5% hard-hit rate, both of which are on pace to be the lowest in his 2021 season. His Pull AIR% of 14.5% is also a drop from his 16.9% last season and a stark decline from the 17.9% he held back in 2022.
Managers in deeper category leagues should continue to ride the hot hand, as he is in a groove at the dish. However, his long-term upside is still in question, as suggested by his underlying metrics. He is the definition of a bargain bin hitter. Don't be afraid to pick him up in the short term, but don't blow your FAAB budget on a high-risk regression candidate.
He can chip in and provide solid power and speed, but his batting average could be a detriment to your roster.
Denzer Guzman, 3B/SS, Los Angeles Angels
10% rostered
The most surprising name on this week's edition. Among the recent call-ups, Los Angeles' Denzer Guzman has gone under the radar. Through his first 13 games in the majors this season (he appeared in 13 last summer), he has held a .255/.321/.471 line with two doubles and three round-trippers. Over the same length in his "debut" campaign, he hit a low .190 AVG.
Since returning to Los Angeles at the start of June, Guzman has been a key part of the lineup, seeing time in the hot corner over the injured Yoan Moncada and Adam Frazier. While the sample size is small, the team's No. 7-ranked prospect has shown some notable underlying metrics.
So far, Guzman has generated a solid .336 xwOBA, .257 xBA, 46.3% hard-hit rate, and a 74,1 mph average bat speed, all of which are above the average marks among qualified hitters. Additionally, this makes you think his current slash line is sustainable, and he is not simply enjoying a "flash in the pan" run of recent success.
In fact, Guzman could see even more success over the second half. When looking at his production against fastballs (he sees them 50.3% of the time), the young infielder has generated a strong .259 BA on the surface, but holds a looming .334 xBA under the hood. His .304 wOBA against this pitch-type is nearly 100 points lower than the .401 xwOBA per Statcast.
Lastly, while the sample is small, Guzman has generated a promising 22.0% Pull AIR%, which keeps the door open for an even higher home-run ceiling. The 22-year-old remains an everyday player in this lineup and is emerging as a potential under-the-radar breakout.
The 33-year-old has carried high fantasy value at times in his career, but has primarily been a "high-floor" option for the past few years. During the 2025 season, the switch-hitting first baseman launched 22 home runs with a .237/.325/.417 line with a 742 OPS.
Over his last 20 games, Bell has quietly been one of the best hitters in all of fantasy, carrying a .329/.364/.532 line with a .889 OPS, six doubles, three home runs, and an eye-catching 17 RBI. Overall on the season, his modest .248/.307/.The 397 line does not instill much confidence, but can managers trust this recent surge as a sign of better things to come in the second half?
While the 33-year-old will not maintain this elite pace for the remainder of the season, his metrics suggest he was getting a bit unlucky over the opening months and beginning to see some well-deserved positive regression. According to Statcast, Bell holds a .324 xwOBA, .254 xBA, and a .432 xSLG, all of which are higher than his surface-level stats, with his xSLG being only 40 points higher.
Additionally, his 6.7% barrel rate, 42.6% hard-hit rate, and 34.5 LA Sweet-Spot% are all above the average marks, suggesting his production in April and May was a sign of pure unfortunate luck.
While his K% has climbed in relation to last summer (16.5% - 22.0%) and his walk rate has dropped (10.7% - 7.4%), he has been hitting the ball more effectively for power. The veteran is currently on pace to hold a career-high 22.7% Pull AIR%, which is a five-point jump from his 2025 mark, which was his previous career-best.
If Bell can continue to see this positive regression show up in the box score and maintain his rising Pull AIR%, we could be looking at a second straight 20-HR season with further untapped upside.
He may not be the flashiest pick-up at the position, but a + .250 AVG with 20-HR upside and high RBI scenarios (his 49 are currently the ninth-most in the AL), makes him a worthy addition in all standard leagues.
Josh Bell has a .949 OPS in June, driving in 17 runs over 21 games. pic.twitter.com/Xyi2G2gHJ5
— Twins Ribbies (@TwinsRibbies) June 24, 2026
Logan O'Hoppe, C, Los Angeles Angels
5% rostered
As always, we will conclude this column with a backstop. Since hitting 20 home runs back in the 2024 season (with a .244 AVG), O'Hoppe has seen his fantasy production steadily decline. In 2025, O'Hoppe hit a similar 19 home runs but posted a much lower .213 AVG and saw his hard-hit rate and barrel rate drop relative to his 2024 marks.
However, throughout 55 games this season, the St. John the Baptist product has shown a steadier profile. He has posted a .235/.303/.353 line with four long balls, but has been very impressive as of late.
Over his last 18 games, O'Hoppe has been one of the best catchers in fantasy, sporting a .310/.322/.552 line with three of these long balls. Is this sudden surge the sign of a bounce-back season from the backstop?
However, unlike Larnach, Bell, and Guzman's surge at the plate, O'Hoppe's production does not appear to be overly sustainable. When looking at his June marks, O'Hoppe has posted a +,300 BA against both fastball and breaking balls, but his underlying extended statistics suggest he has greatly outperformed this (as shown in the visual below).
Additionally, his overall hard-hit rates against specific pitch-types have not increased by a wide margin, suggesting that much of his production in June is more likely due to better fortune at the dish than a drastic improvement in his raw profile.
Overall, O'Hoppe sits with a low .203 xBA and a .282 xwOBA, which places him in the 10th percentile or lower. However, the lone aspect worth monitoring is his high-end 11.1% barrel rate and near-elite 20.6% Pull AIR%. This suggests that while he should continue for another 20-HR campaign, it will come with a highly volatile batting average and a hefty K%.
Those needing a second catcher with power upside should target O'Hoppe, but be aware of the major risk to your batting average he could deliver, as his underlying metrics suggest.
