Buy Low, Sell High Fantasy Baseball Trade Advice for Week 5 (2026)

April 28, 2026

Joey's fantasy baseball buy low, sell high trade advice for Week 5 of 2026. His undervalued fantasy baseball trade targets and overvalued players to trade away.

Welcome, RotoBallers, to our weekly buy/sell fantasy baseball trades advice article for Week 5 of the 2026 season, highlighting the best players to trade for and trade away. Each week of the fantasy baseball season, we will look at which players are the best buy-lows to acquire and who might be the biggest sell-highs. 

This week's list will feature five of the top trade candidates. The first three players featured should be bought low across all fantasy formats, and the other two players are major sell highs. The two sell-high candidates are currently overperforming, and their fantasy value will never be higher.  

So, which players should fantasy managers buy and sell for Week 5 of the fantasy baseball season? Let's dive in.

Undervalued Fantasy Baseball Players to Trade For

Rafael Devers, 1B, San Francisco Giants

San Francisco Giants first baseman Rafael Devers was an early-round pick in all fantasy drafts this spring due to his power. Devers has hit over 30 home runs and driven in over 100 runs in two of the past three seasons. The lefty slugger has also been able to maintain a solid batting average, as he has finished with above a .270 average in four of the last five years.

However, Devers has looked lost at the plate in the early going. He is batting just .216 with two home runs, 10 RBI, and 36 strikeouts across 28 games, and his Batting Run Value (-8) ranks in the bottom 2% of the league. There's simply no way around it; his start to the season has been extremely disappointing.

Despite those poor numbers, though, Devers is someone that most fantasy managers should be looking to buy in Week 5. His track record suggests he will eventually figure it out, and slow starts aren't necessarily new to him. Last year, he batted just .194 with two home runs, 14 RBI, and 36 strikeouts in his first 27 games. He then went on to hit .263 with 33 home runs and 95 RBI from April 26 onward.

Rafael Devers 108 the other way on a rope is so good to see. More of this!! pic.twitter.com/28Z1IAnDzX

— Giant Hot Takes (@GiantHotTakes) April 26, 2026

That makes Devers a fantastic buy-low candidate. He's still hitting the ball hard (44% hard-hit rate), and this is a player who likely finishes with close to 30 home runs and 100 RBI once again.

Pete Alonso, 1B, Baltimore Orioles

Those who drafted Baltimore Orioles first baseman Pete Alonso are not happy with his early-season production. Alonso is batting only .196 with three home runs, six doubles, 10 RBI, and 32 strikeouts in 28 games on his new team. That's a major difference from where he was at this point last year, as the slugger had .333 with six home runs, 11 doubles, 26 RBI, and 18 strikeouts in his first 28 games in 2025.

But like Devers, trust the track record with Alonso. The five-time All-Star has hit at least 38 home runs and driven in over 115 runs in three of the past four seasons. He has become one of the best power hitters in the game during this span while also carrying a solid batting average. Alonso finished with a career-best .272 batting average last season.

Pete Alonso gives the @Orioles an early lead 💥 pic.twitter.com/1E5Oqyn1ci

— MLB (@MLB) April 22, 2026

Therefore, Alonso is the perfect buy-low player right now. His bat will heat up as the weather warms up, and his metrics back that up. The 31-year-old currently ranks in the 97th percentile in average exit velocity (94.6 mph) and in the 95th percentile in hard-hit rate (56%). He also always seems to bounce back after month-long slumps. After batting .141 in 24 July games last year, he hit .297 with 16 homers in the final two months.

Look to buy him now before his numbers start to improve.

Fernando Tatis Jr., OF, San Diego Padres

It's not going to be easy to acquire San Diego Padres outfielder Fernando Tatis Jr. in any league. He was a top pick in fantasy drafts for a reason and has shown in the past to be an all-around fantasy superstar. If someone in your league is willing to trade Tatis for any reason, though, now is the best time to acquire him.

Tatis is off to a subpar start to the 2026 season. He is batting just .252 with four extra-base hits, 12 RBI, and six stolen bases in his first 28 games. The three-time All-Star has yet to hit a home run across 120 plate appearances, has not logged an RBI in seven straight games, and currently has a -2 Batting Run Value. Some fantasy managers could be worried about the fact that he has zero home runs through the first month.

His slower-than-usual start to the season makes him the easiest buy in every fantasy league. The home run numbers will eventually come, and his advanced metrics fully support that. Tatis ranks in the upper half of the league in average exit velocity (94.3 mph), barrel rate (12%), hard-hit rate (66.7%), launch angle sweet-spot rate (38.7%), and squared-up rate (28.4%).

So, see what it would take to acquire him. His fantasy value is slightly down from the start of the season, making now the perfect time to make an offer.

Overvalued Fantasy Baseball Players to Trade Away

Max Muncy, 3B, Los Angeles Dodgers

Los Angeles Dodgers third baseman Max Muncy has been on an absolute heater since mid-April. The veteran slugger is batting .358 with eight home runs, three doubles, 10 RBI, and eight walks over his last 15 games. Muncy has had three multi-homer games during this span and has lifted his batting average 84 points from .216 to .300.

Max Muncy connects for a long home run! pic.twitter.com/cuGCWWoSkw

— MLB (@MLB) April 18, 2026

Although Muncy has been hitting the ball well recently, he has been known as such a hot-and-cold hitter across his career. That was the case throughout the 2025 season. He batted .194 with one home run across his first 29 games last year, then batted .333 with seven home runs across 25 games in June, and ended the year by hitting .118 with two home runs in 11 September games.

That makes now the best time to trade away Muncy. He is going to cool off at the plate eventually and won't be this .300+ hitter for the remainder of the season. This is the same hitter who has a career batting average of .231 and has finished under a .235 batting average in three of the past four years. There are just too many inconsistencies in the veteran's game, which makes him a sell-high candidate.

Taj Bradley, SP, Minnesota Twins

Minnesota Twins starting pitcher Taj Bradley has shown signs of breaking out this season. He tossed six shutout innings with three strikeouts against the Royals on April 2, threw 6 1/3 innings of one-run ball with 10 strikeouts against the Tigers on April 7, and delivered six innings of two-run ball with five strikeouts against the Reds back on April 18.

While Bradley has thrown the ball well for the most part this season, his metrics suggest some major regression is coming his way in the next few weeks. His expected ERA (4.25) is 134 points higher than his actual ERA (2.91), and his expected batting average against (.249), average exit velocity (94.1 mph), chase rate (27.3%), hard-hit rate (46.3%), and whiff rate (24.2%) all rank in the bottom half of the league.

After allowing six earned runs in his most recent start against the Rays last week, it's time to trade away the right-hander in all formats. He's gotten a bit lucky on the mound in the early going, and opposing batters have been all over him lately. Bradley currently ranks dead last among all qualified starters in average exit velocity. Make the smart move and trade him away before his fantasy value tanks even more.

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