Ryan Dalton Helsley
- Bats Right, Throws Right
- Height 6' 1", Weight 195 lb.
- School Northeastern State University
- High School Sequoyah High School (Tahlequah)
- Debut April 16, 2019
On May 1, 2022, one of his pitches was clocked at 103.1 mph on the radar gun, the fastest by anyone that season, although still a couple of mph off the all-time record held jointly by Aroldis Chapman and teammate Jordan Hicks. He took over as the Cardinals' closer during the season, ending up with 19 saves to go along with a 9-1 record and a 1.25 ERA in 54 games. He struck out 94 batters in 64 2/3 innings. In Game 1 of the Wild Card Series on October 7th, he was brought in to protect a 2-0 lead against the Philadelphia Phillies with one out in the 8th. Things started off very well as he retired two batters to end the 8th and then started off the 9th by striking out Rhys Hoskins, but after that he fell apart completely, losing his control as he allowed a single to J.T. Realmuto then walked Bryce Harper and Nick Castellanos to load the bases. He hit Alec Bohm with a pitch to force in a first run, and was replaced by Andre Pallante. What could have been a double play grounder by Jean Segura, which would have ended the game, went past 2B Tommy Edman; two runs scored, and the Phils eventually scored six runs in the nightmarish inning, pinning the loss on Ryan.
- John Denton: "Radar gun on the fritz? No, 103.1 mph is real", mlb.com, May 1, 2022.