It'sdeadline day in Major League Baseball, with mere hours until the league's 6 p.m. ET trade deadline, and teams are jockeying to make moves for the stretch run. TheSeattle Mariners made the biggest moveovernight, landing sluggerEugenio Suárezin a deal with Diamondbacks, just a week afteracquiring Josh Naylorfrom Arizona. All-Star starting pitchersSandy AlcantaraandZac Gallencould also have new homes come dinnertime. Which contenders will improve the most on Thursday? The baseball world is certainly set for an intriguing deadline day. Follow along for the latest news, rumors and updates leading up to the deadline. TheSt. Louis Cardinalsare sending pitcherSteven Matzto theBoston Red Soxfor prospect Blaze Jordan,according to multiple reports. Matz, 34, is a former starter who's mainly been used in the bullpen during his time in St. Louis. He has a 3.44 ERA in 32 appearances this season. Just ahead ofMLB's trade deadline day,Philadelphia Philliespresident of baseball operations Dave Dombrowski made a big splash by landing one of the top closers on the market –Jhoan Duranfrom theMinnesota Twinsfor pitcher Mick Abel and catcher Eduardo Tait. Phillies grade: A Twins grade: B+ Read a full analysis of the trade here. – John Leuzzi, USA TODAY The Mets front office isbuilding a monster of a bullpenahead of the trade deadline. A few hours after the team acquired Tyler Rogers from the Giants on Wednesday afternoon, the Mets agreed to adeal to land Cardinals right-handed closer Ryan Helsley. It is an arms race in the National League East, with thePhilliesaddingTwins closer Jhoan Duran. This season, Helsley has converted 21 out of his 26 save opportunities while pitching to a 3.00 ERA, 1.39 WHIP and 41 strikeouts in 36 innings. The 31-year-old, who is on an expiring $8.2 million deal, is a two-time All-Star. He has spent each of his seven seasons with the Cardinals, where he was drafted in the fifth round in the 2015 MLB Draft.– Andrew Tredinnick, NorthJersey.com Ke'Bryan Hayes, 28, comes to Cincinnati in exchange for veteran reliever Taylor Rogers,who the Reds acquired this past offseason, and prospectSammy Stafura, 20, who was drafted in the second round with the 43rd overall pick in 2023 and who was in big league camp this past spring training. Hayes, a Gold Glover in 2023, checks several boxes for Cincinnati at the trade deadline as he's under team control through 2029, and affords the club flexibility with its existing players and prospects. Most significantly, Hayes will be a clear upgrade defensively. "He might be the best defender in baseball," Reds manager Terry Francona said. "If not, he's right there. He's that good. We're trying to find ways to get better and sometimes it might not be the sexiest move but we care so much about trying to play clean baseball and this will be a huge step in that direction."– Pat Brennan and Gordon Wittenmyer, Cincinnati Enquirer The MLB trade deadline is set for 6 p.m. on Thursday, July 31. The 2025 MLB trade deadline falls at 6 p.m. ET. This article originally appeared on USA TODAY:2025 MLB trade deadline rumors, latest news, updates, predictions