The Rockies dropped to 21-71 with today’s loss in Boston, putting them on a 37-win pace for the season. That’d have them four wins shy of last year’s White Sox, the worst team in modern history. The Rockies are obviously going to be deadline sellers, but the extent of that sale is complicated by the organization’s track record of holding onto players that any other team would have traded.

Ken Rosenthal of The Athletic writes that the Rox intend to be more willing to listen on veteran players than they have been at prior deadlines. He suggests they’ll seriously entertain interest in the likes of third baseman Ryan McMahon, reliever Jake Bird, and starter Germán Márquez. That broadly aligns with a report from Jon Heyman of The New York Post last week. Heyman reported that the Rockies are open to offers on McMahon, specifically, after they pulled him off the trade market early in 2024.

However, that increased willingness to deal veterans doesn’t mean the Rockies are completely open for business. Rosenthal writes that the team remains unlikely to trade young players whom they view as core pieces. He lists shortstop Ezequiel Tovar, center fielder Brenton Doyle, and rookie righty Chase Dollander in that group. Rosenthal more surprisingly adds relievers Seth Halvorsen and Zach Agnos, plus starter Ryan Feltner, as players who may fall in the latter category.

McMahon, Márquez and Bird are Colorado’s three most obvious trade chips. They all featured prominently on MLBTR’s initial list of the top 40 trade candidates last week. McMahon is a plus defensive third baseman with power and strikeout concerns. He had an abysmal April, raked in May, and has cooled back off since the beginning of June. He’s hitting just .210/.310/.373 on the season and has been a well below-average hitter (.207/.305/.350) over the past calendar year.

There’ll nevertheless be interest in McMahon, particularly given the scarcity of infield talent that may be available. The Yankees need to acquire a third baseman and have reportedly already checked in. The Cubs and Tigers are speculative possibilities. McMahon is playing on a $12MM salary in his age-30 season and will make $16MM annually between 2026-27.

Márquez is an impending free agent who is making $10MM. He was an above-average starter earlier in his career but hasn’t been as sharp since undergoing Tommy John surgery in 2023. He’s sitting on a 5.84 ERA with a subpar 15.3% strikeout rate over 18 starts. The 30-year-old righty is coming off his best month of the season, though, working to a 2.97 mark while striking out 21% of opponents in June. His fastball still sits around 95 MPH, so teams could view him as an upside play outside of Coors Field. He’s unlikely to be a qualifying offer candidate, so there’s little reason not to trade him.

Bird, 29, had quietly been one of the league’s best relievers until he was blown up by the Red Sox on Tuesday. That outing jumped his season ERA by nearly a full run, up from 2.79 to 3.70. Bird has fanned more than 27% of opposing hitters and has generally done well to keep runs off the board. He looked to be a fairly nondescript middle reliever entering the season. He’s under club control for three seasons beyond this one, but this is a breakout year for a reliever approaching his 30th birthday. The Rockies would be wise to cash him in this summer while his trade value is at its peak.

The Rockies have a few other veteran players, though they’d have little to no trade value. They’ll presumably hope to find a lottery ticket prospect for the likes of Thairo Estrada, Austin Gomber and Tyler Kinley. It’s not surprising they’re reluctant to move Tovar or Doyle, both of whom are struggling through down years but looked like potential cornerstones a season ago. Dollander has been hit hard in his debut campaign and was recently optioned back to Triple-A, but he’s a recent top 10 pick and the organization’s best hope of developing a front-line starter.

Feltner is a back-of-the-rotation starter who has missed most of this season rehabbing a back issue. He just returned from the injured list last week and has been limited to six starts. The Rox could get a notable return for Halvorsen, a fireballer who has gotten a look in the ninth inning. He’s only 25 and controllable for five more seasons. A team in Colorado’s position should arguably be willing to trade any reliever, but there’s more of a case for holding Haloversen than there would be with Bird. It’s tougher to see the logic in including Agnos as a potential building block. He’s a rookie reliever with a 5.19 ERA and 15 strikeouts in his first 26 career innings. Agnos, a former 10th-round pick, has good but not elite velocity and has never been a highly-regarded prospect despite excellent minor league numbers.