As Memorial Day approaches, MLB trade rumor season begins to unveil key storylines leading up to the July 31 deadline. While the season traditionally heats up in June, early discussions are coming into focus. Moneyline introduces a BS Meter to help fans gauge how much credibility to assign to various trade rumors. The BS Meter features four settings: non-existent, low, medium, and high, aimed at providing insights without questioning the integrity of the reporters involved.

One notable rumor comes from Mark Feinsand of MLB.com, who reported that the Philadelphia Phillies had reached out to David Robertson before José Alvarado’s recent performance-enhancing drug suspension became public. Feinsand noted that no serious negotiations occurred. The credibility of this report is considered low, as even prior to Alvarado's suspension, the Phillies likely needed bullpen reinforcements. With Alvarado out, reaching out to Robertson, who is currently a free agent, seems logical. However, there is skepticism about whether a deal will materialize, particularly given Robertson’s continued availability despite a solid performance last season with the Texas Rangers, where he posted a 3.00 ERA and 2.65 FIP across 68 games. The uncertainty surrounding his willingness to accept contract terms or contemplate retirement raises questions regarding his immediate future in the league.

Another rumor from Bob Nightengale of USA Today indicated that the Los Angeles Dodgers and Chicago Cubs are closely monitoring the status of Ryan McMahon from the Colorado Rockies in the event he becomes available. This report receives a high rating on the BS Meter, given the Rockies' recent history of hesitance to sell major players, despite currently underperforming. McMahon, while once an All-Star, is hitting .211 with a .706 OPS, which complicates trade discussions given his $32 million salary commitment from 2026 to 2027. The Dodgers may not be a suitable landing spot unless it appears Max Muncy will not rebound from his slow start at the plate, leaving teams uncertain about McMahon's market value.

Jon Heyman has also weighed in on the potential for the Pittsburgh Pirates to trade Paul Skenes, addressing rumors with a definitive 'no way, no how, no chance.' This claim is deemed non-existent on the BS Meter. Fans of contending teams wishing to see Skenes moved are likely misguided, as the 22-year-old pitcher, who boasts a 2.12 ERA through his first 33 MLB starts, represents a significant asset for a struggling franchise. Despite the Pirates' challenging season, Skenes is a player they should focus on building around in the coming years. While future considerations could involve a deal as he approaches free agency, trading him now would be illogical for a franchise aiming to improve.

Lastly, Nightengale speculated that Rhys Hoskins could be an ideal fit for the Boston Red Sox if the Milwaukee Brewers decide to sell. This commentary sits at a low rating on the BS Meter. The speculation arises from the potential for Hoskins to excel in Fenway Park due to his power-hitting profile. The main challenge lies in the Brewers' performance, as they remain within striking distance of contention at 24-26. Historically, the Brewers have demonstrated a willingness to trade veterans, as seen with Josh Hader's departure in 2022. Should Hoskins continue to perform well post-recovery, the Brewers may be inclined to trade him to secure prospects and alleviate financial commitments, particularly given his respected status in the clubhouse and the potential interest from teams like the Red Sox.

Additionally, Jon Heyman commented on Luis Robert Jr., suggesting he would not be traded if his performance dipped below .200. This assertion receives a non-existent rating on the BS Meter, with general consensus supporting this view. Robert's contract appeared favorable not long ago, but following a downturn in production, teams would likely regard him as a rental player. While he has demonstrated speed and defensive skill, concerns about his long-term value in light of his injury history and subpar performance make it unlikely for teams to part with high-value prospects in any potential trade scenario.