Texas Rangers left‑hander MacKenzie Gore exited Monday night’s start in Colorado after just one inning, citing muscle tightness in his back. He rose cautiously after diving for a slow roller toward third, then retired the next two batters before the Rangers pulled him before the bottom of the second. The early deficit forced the Rangers to chase runs later and limited their offensive options.

Gore, acquired from Washington in the offseason, had compiled a 3‑3 record with a 4.50 ERA over nine starts this season. His injury coincided with the Rangers placing shortstop Corey Seager on the 10‑day IL for lower‑back inflammation, further depleting a rotation already thin on healthy arms. His back tightness raises concerns about durability throughout a grueling summer schedule.

Rangers manager Chris Woodward will need to rely on back‑up arms such as left‑hander Andrew Heaney and rookie right‑hander Diego Castillo to bridge the gap. With the team hovering near the AL West playoff line, losing another starter could jeopardize a late‑season push. Medical staff will monitor his progress, hoping for a return soon.