The New York Mets have placed rookie right-hander Christian Scott on the 15-day injured list due to a right ulnar collateral ligament (UCL) sprain, a concerning injury that raises fears of potential Tommy John surgery. Scott's injury is retroactive to July 22, and he will be replaced on the roster by left-hander Alex Young, who was recalled from Triple-A Syracuse. In his nine starts this season, Scott has posted a 4.56 ERA, but his performance has fluctuated, with a notable decline in effectiveness since returning from a prior stint in Triple-A. The severity of the sprain remains unclear, but UCL injuries often lead to surgery, which could sideline pitchers for an extended period. Meanwhile, the Mets are optimistic about the recovery of Reed Garrett, who has resumed throwing, and Sean Reid-Foley begins a rehab assignment soon. This injury adds to the growing list of concerns for the Mets' pitching staff as they gear up for the Subway Series against the Yankees.