Helsley, 31, has been one of the game's best closers since moving into the role for St. Louis in 2022. With a high-octane fastball and untouchable slider, he's posted 103 saves and a 2.03 ERA with 266 strikeouts in 203 2/3 innings during that time.

The New York Mets and San Francisco Giants agreed to a four-player swap on Thursday, just more than 24 hours away from Major League Baseball's trade deadline, that centered around veteran reliever Tyler Rogers.