Fantasy managers need to keep a close eye on the Arizona Diamondbacks heading into the final days of May, as three separate roster situations are creating potential waiver wire opportunities as of May 27, 2026. Whether you're hunting for a streaming option or a longer-term stash, the fantasy baseball waiver wire is heating up in the desert. Here's a breakdown of the latest MLB player news and what each signal means for your roster.
Pavin Smith (ARI) — Return From Injury
Smith has begun a rehab assignment in the Arizona Complex League following elbow surgery, and the Diamondbacks appear to be fast-tracking his return to the big league roster. For fantasy managers monitoring the waiver wire, Smith is worth a speculative add now before the rest of your league catches on.
Once activated, Smith is expected to contend for starts at first base and at designated hitter, particularly in favorable matchups against right-handed pitching. Managers in deeper leagues or those carrying a weak corner infield spot should consider stashing him now to get ahead of the activation timeline.
Confidence: 65% — The rehab assignment is confirmed, but the exact return date remains uncertain. Monitor his progression through the ACL system closely before committing a meaningful roster spot in shallower leagues.
Tommy Troy (ARI) — Role Expansion
With Lourdes Gurriel Jr. landing on the injured list due to a hamstring injury, Tommy Troy is stepping into a starting role in left field for Arizona. This is the kind of short-term opportunity that fantasy baseball waiver wire surfers should be targeting in deeper formats right now.
Troy's playing time is directly tied to Gurriel's absence, which means he's a speculative add rather than a must-roster asset. In standard mixed leagues, his value is limited, but in 15-team or deeper dynasty and redraft formats, he's worth the roster spot while Arizona needs outfield coverage.
Confidence: 65% — The role is real but contingent on Gurriel's IL timeline. Check the latest MLB injury report updates on Gurriel's hamstring before committing to Troy in any format shallower than 14 teams.
A.J. Puk (ARI) — Return From Injury
Left-handed reliever A.J. Puk made an encouraging rehab debut, throwing a perfect inning as he works his way back from injury. The plan is for Puk to advance through higher affiliates before rejoining Arizona's bullpen, making him a prime fantasy baseball waiver wire stash for relief-needy managers.
Puk has the stuff to contribute in holds and strikeout-per-inning categories once he's back in the majors, and getting him on your roster before the callup means you're ahead of the inevitable waiver rush. The rehab process still has multiple steps, so patience is required, but the early returns are positive.
Confidence: 65% — The perfect inning is a great sign, but relief pitcher injuries require careful monitoring through each rehab step. Fantasy managers in holds or strikeout-heavy formats should prioritize this add over standard 5x5 managers.
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All three of these Diamondbacks situations are fluid, and the difference between a timely pickup and missing the window often comes down to hours, not days. Staying ahead of the fantasy baseball waiver wire means having the right tools to act on MLB injury report updates and role changes the moment they happen. Don't let your leaguemates beat you to the next big pickup — get real-time signals and AI-powered lineup advice at PlayCaller — free 7-day trial at playcallerapp.com