MLB Rumors: 10 potential surprise trade deadline candidates

Once a higher rated prospect than Fernando Tatis Jr. and Juan Soto, Robles hasn't been able to replicate the offensive production that he posted in his rookie season of 2018, when he homered 17 times, posted a .745 OPS and stole 28 bases. Still just 25, if there's a team that believes it can help fix the offensive production of Robles, it wouldn't take much to turn him into one of the better center fielders in baseball. He's already one of the best defenders in the sport, having posted 27 defensive runs saved and 31 outs above average in his young career. Perhaps the division-rival Philadelphia Phillies -- who employ his former hitting coach Kevin Long and badly need to make defensive upgrades -- could be a potential suitor.

At age 31, Pérez appears to be a lock for his first All-Star Game appearance, having posted a 2.10 ERA and 2.62 FIP across 13 starts in 2022. While the Rangers signed Corey Seager, Marcus Semien, Jon Gray and Brad Miller this past offseason, bringing back Pérez for a second stint with the team has proven to be their best investment to this point. Texas may very well want to work out a long-term deal to keep Pérez, who signed for just $4 million this past offseason. But if they fall out of the playoff race altogether, Pérez's trade value will never be higher than it is right now.

It's going to take quite the offer to get the Orioles to part ways with Mullins, and given that he's having a solid season but one that falls short of the MVP-caliber campaign he put up a year ago, teams may not be as inclined to push their chips to the center of the table for him this summer. But Mullins is only 27, has four defensive runs saved in center field and can't become a free agent until after the 2025 season. At a position without much of a middle class, teams are certainly going to try to pry Mullins away from the O's.

A year ago, the Mariners won 90 games, despite posting a -51 run differential. High hopes before the 2022 season have dissipated, though, as the Mariners have a -19 run differential and a 29-39 record to show for it. President of baseball operations Jerry DiPoto, perhaps to a fault, loves to wheel and deal. Gonzales, 30, could be one name that he gets quite a few calls on over the next month. Since the start of the 2019 season, Gonzales has a 3.77 ERA in 83 starts. He also is signed to a very team-friendly contract, as he's due just $18.5 million over the next two seasons, with an affordable $15 million club option for 2025.

Something of a late bloomer, the 31-year-old Cooper is having the best season of his career, as he's slashing .312/.382/.454 with a 1.6 fWAR. Cooper is making just $2.5 million in 2022, and has one remaining year of arbitration eligibility in 2023. Cooper can play first base, be a DH and has experience at both corner outfield positions, so don't be surprised if he's in demand if general manager Kim Ng and the Marlins choose to sell.

Given how difficult it is to attract pitching to Coors Field, the Rockies may not be particularly eager to part with Márquez, especially given that his value isn't exactly at an all-time high right now with his 6.16 ERA in 2022. With that said, Márquez is only 27 and has already pitched 170 or more innings in three separate seasons. A year ago, he pitched three complete games, tied for the major league lead. His career ERA on the road (3.95) is almost a full run lower than it is at home (4.93). He also has a pretty team-friendly contract, as he's due $15 million in 2023, with a $16 million club option for 2024. It's not hard to imagine opposing executives talking themselves into Márquez become one of the game's elite starting pitchers if he gets away from Coors Field.

You can almost copy and paste what's written about Mullins above when discussing Reynolds. A year ago, Reynolds finished 11th in National League MVP voting, after posting a 6.1 fWAR. This year, he's put up some nice production -- 11 home runs, .774 OPS and a 0.8 fWAR -- but it is a relative let down when compared to 2021. Like the Orioles, the Pirates are in the midst of a seemingly never-ending rebuild. Could Reynolds be a part of the next great Pirates team? Sure, he's 27 and can't become a free agent until after 2025. At the same time, those qualities -- again, at a position without a ton of needle movers -- also make him such an intriguing trade target.

It increasingly feels like a matter of when, not if, the Cubs trade free-agent-to-be Willson Contreras, one of the game's top catchers. Hendricks -- one of the last remaining heroes from the 2016 World Series team -- is under contract through 2023 with a vesting option for 2024, so there isn't the same impetus to make a decision on him this summer. But the former National League Cy Young Award finalist has really struggled since the start of the 2021 season, posting a 4.95 ERA and 4.97 FIP. Hendricks is still only 32, and has pitched 175 or more innings on five occasions, including as recently as last season. He could benefit from a change of scenery, one where he would be injected into a pennant race.

Winker recently avoided arbitration by signing a two-year/$14.5 million contract with the Mariners, but as FanSided's Robert Murray said, that doesn't necessarily mean he'll play all of that in Seattle. An All-Star a year ago with the Cincinnati Reds, Winker has disappointed in his first year with the Mariners. Still, he leads the American League with with 42 walks and is a year removed from posting a .949 OPS. Again, Jerry DiPoto loves to make trades, so who knows.

The Tigers have been one of the most disappointing teams in 2022, as they're currently 26-41 with a -95 run differential after a very active offseason. We don't know how much general manager Al Avila is going to be willing to sell, but Soto was an All-Star a year ago, and has 13 saves in 15 attempts in 2022. Whether contenders envision him as a closer or set-up man, the 27-year-old can't become a free agent until after the 2025 season, so he'll be of interest if the Tigers are willing to listen.