On Wednesday, September 14, 2011, the Missions began what would turn out to be the longest postseason game in Texas League history. Playing against the Arkansas Travelers in the league's championship series, the Missions battled to a 5–4 victory that took 20 innings—and a spillover into Thursday—to settle. The win propelled the Missions to a series sweep, earning the franchise its 12th championship since the Texas League was founded in 1888.
Throughout those 113 years, the Texas League underwent many changes, but San Antonio stood firm—the only one of the league's six original teams to play in three different centuries. As the San Diego Padres' Double-A affiliate, the Missions continue their legacy at their home field, Wolff Stadium, a 6,200-seat facility complete with a grass berm in left field where fans can sprawl out to watch the innings and where umpires sunbathe between games.