In return, the Cardinals received Mets' No. 8 prospect (SS) Jesus Baez, No. 14 prospect (P) Nate Dohm, and (P) Frank Elissalt.
Helsley has 21 saves on 26 opportunities this season, posting a 3.00 earned run average in 36 games. The 31-year-old has given up 12 earned runs on 36 hits in 36 innings, striking out 41 while walking 14. Opponents are hitting .259 against Helsley this season, the highest since his rookie year in 2019 (.245).
Helsley is currently on a one-year deal and will be an unrestricted free agent at the end of the season.
Baez is currently slashing .242/.332/.390 with 10 home runs, 42 RBI, and seven stolen bases in 46 total games.
After just six games in Single-A to start the year, the 20-year-old was called up to High-A ball where he's starting to find his stride.
As for Dohm, the 23-year-old rookie is pitching great in High-A ball this season, posting a 2.87 ERA in 18 games (17 starts). Doh has 77 strikeouts and 23 walks through 62.2 innings while giving up 20 earned runs on 56 hits.
Opponents are hitting just .217 off Dohm in High-A this season, showing that the former third-round pick in the 2024 MLB Draft could be a solid pitcher for the Cardinals down the line.
Even though he's not on the Mets' top prospect list, Elissalt is also having a solid season on the mound in Single-A this season.
The 23-year-old was traded after just two games in High-A, but the former 19th-round pick in the 2024 draft is tossing a great 3.02 ERA in 18 total games (7 starts) with opposing batters hitting just .172 against him.
Elissalt has 65 total strikeouts, 21 walks, and 35 hits in 56.1 innings this season.