Buy Low, Sell High Fantasy Baseball Trade Advice for Week 13 (2025)

Joey's fantasy baseball buy low, sell high trade advice for Week 13 of 2025. His undervalued fantasy baseball trade targets and overvalued players to trade away.

Welcome, RotoBallers, to our weekly buy/sell article highlighting the best players to trade for and trade away. Each week of the fantasy baseball season, we will look at which players fantasy managers should be targeting in trade discussions and which players it's time to get rid of heading into the following week. 

In this week's edition, there are two buy-low options and three sell-high options. The two buy-low players are currently undervalued in fantasy leagues right now, and the three sell-high players should regress over the next few weeks. 

So, which players should fantasy managers buy and sell for Week 13 of the fantasy baseball season? Let's dive in and find out. 

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Undervalued Fantasy Baseball Players to Trade For

Hunter Greene, SP, Cincinnati Reds

Cincinnati Reds starting pitcher Hunter Greene hasn't been able to stay healthy in his short career. He missed six weeks due to a shoulder strain in 2022, was out for over two months due to a hip injury in 2023, and dealt with an elbow injury in 2024 that caused him to miss five weeks. Therefore, it's not shocking to see Greene back on the injured list in 2025. 

Greene first landed on the 15-day IL back on May 8 following some groin soreness. Although the right-hander was only out for the minimum 15 days, he found himself back on the IL a few weeks later. The 2024 All-Star went back on the IL on June 4 and has been out for the past three weeks due to a Grade 1 groin strain and a sore back. 

Update on Hunter Greene (groin/back). He will throw on the final day of the Boston trip. Likely a bullpen session. Will evaluate further after that

Austin Hays (foot) is DH’ing tomorrow at Chattanooga & then play the OF Wednesday. In a perfect world — he may be back on Friday.

— Charlie Clifford (@char_cliff) June 23, 2025

Even though the Reds pitcher still has no timetable for a return, this is the perfect time to buy low on one of the best fantasy pitchers when healthy. Greene had an impressive 2.72 ERA and 73 strikeouts across his first 11 starts this season. With a high strikeout rate (30.8%) and an elite walk rate (5.9%), it's hard not to love his long-term fantasy value in 2025. 

Fantasy managers have to be patient with Greene because it might be a few weeks until he returns. The good news, though, is that you can stash him in one of your IL slots until he returns. The right-hander should be back with the big league club sometime in July. 

Spencer Torkelson, 1B, Detroit Tigers

It has been hard to trust Detroit Tigers first baseman Spencer Torkelson in recent weeks. He is batting just .173 with three home runs, nine RBI, and 22 strikeouts in his last 20 games dating back to May 27. This stretch has led many fantasy managers to give up on the young 25-year-old in most formats.

So, see what it would take to acquire Torkelson. While his recent numbers haven't been great, he still ranks second in home runs (16), tied for fourth in RBI (49), tied for fourth in runs scored (43), and third in walks (38) among all first basemen this season. That's why trading for him right now could be a smart long-term move for your fantasy team. 

Torkelson is on pace to hit over 30 home runs and drive in upward of 95 runs in 2025. There is also reason to believe that his bat will heat up in the coming weeks. His expected slugging (.510), barrel rate (14.1%), launch angle sweet-spot rate (40.6%), and chase rate (20.3%) all rank in the top 18% of the league.

These are the type of players you should be trading for in Week 13. 

Overvalued Fantasy Baseball Players to Trade Away

Clay Holmes, RP/SP, New York Mets 

When the New York Mets decided to convert reliever Clay Holmes to a starter after signing him in free agency, not many fantasy managers knew what to expect from him. He hadn't started in a major league game since September 30, 2018, and had a 7.80 ERA in four starts during that 2018 season. 

However, Holmes has looked solid as a starter in 2025. He has a 3.04 ERA and 73 strikeouts across 83 innings pitched and has allowed two runs or fewer in 10 of his 15 outings. The 32-year-old has also pitched well against some top offenses, throwing six innings of one-run ball with five strikeouts against the Chicago Cubs back on May 9. 

Although Holmes has been a consistent arm in New York's rotation this year, he is one of the biggest sell-high candidates in fantasy. He has already thrown a career-high 83 innings, and we aren't even at the All-Star break yet. On top of that, fantasy managers should expect some regression from the right-hander over the next few weeks. 

Clay Holmes

First 7 GS
25% K%, 8% BB%, 16.7% K-BB%, 3.08 JA ERA

Last 8 GS
18% K%, 9.5% BB%, 10.6% K-BB%, 4.08 JA ERA pic.twitter.com/NOtlxSPez6

— Jon Anderson (@JonPgh) June 20, 2025

His expected ERA (3.94), whiff rate (22.3%), strikeout rate (21.1%), and hard-hit rate (42.4%) all rank in the bottom half of the league. That makes now the perfect opportunity to trade away Holmes before his overall numbers start to decline. There's also a strong chance that the Mets limit his innings down the stretch, considering he hasn't thrown more than 70 innings in his career. 

Javier Baez, SS/OF, Detroit Tigers

Detroit Tigers utility specialist Javier Baez has had a fantastic comeback story this season. After hitting a combined .208 with 15 home runs, 96 RBI, and 20 stolen bases over the past two years, Baez is putting up All-Star numbers in his 12th major league campaign. He is slashing .290/.328/.473 with nine home runs and 36 RBI across 66 games in 2025. 

Those solid all-around numbers have made Baez a reliable fantasy option in most leagues. Nevertheless, it's only a matter of time until the two-time All-Star comes crashing back down to earth. His expected slugging (.406) is 67 points lower than his actual slugging (.473), and his barrel rate (6.9%), hard-hit rate (40.8%), and chase rate (40.8%) all rank poorly. 

As a result, Baez is someone you should be selling right now. Even though he is batting .370 with three home runs, two doubles, one triple, and six RBI over his last 14 games, his bat will eventually cool off. Fantasy managers should use this hot offensive streak to trade him away because it won't last much longer. 

Xander Bogaerts, 2B/SS, San Diego Padres

San Diego Padres infielder Xander Bogaerts has been red-hot at the plate over the past two weeks. The veteran is hitting .340 with one home run, five doubles, and seven RBI over his last 12 games and seems to finally be turning a corner following a poor start to the year. Bogaerts batted just .231 with three home runs in his first 50 games. 

Xander Bogaerts goes 4-for-4 with a HR as the @Padres end LA's 5-game winning streak. pic.twitter.com/GFvpvVt5PR

— MLB (@MLB) June 20, 2025

This has no doubt been a nice stretch for the four-time All-Star. He continues to get on base at a high level, and his batting average currently sits at .252 on the season. However, it might be time to trade the shortstop in most leagues in Week 13 of the fantasy baseball season. 

Bogaerts doesn't post elite numbers in any category. He is on pace for fewer than 10 home runs, 60 RBI, and 70 runs scored this season, and his batting average won't be much higher than what it is currently. With a .397 expected slugging, 37.7% hard-hit rate, and a 5.4% barrel rate, he is a sell-high candidate in most formats. 

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