Triple-A Baseball

Triple-A follows standard Major League Baseball rules with several notable modifications designed to support player development and pace of play. The season runs from late March or early April through mid-September, with teams playing 150 games. Rosters are set at 28 players during the regular season. A pitch clock is enforced: 15 seconds with bases empty, 20 seconds with runners on. An automated ball-strike system (ABS) has been tested at the Triple-A level as MLB evaluates electronic strike zones. The designated hitter is used universally. Playoffs feature division winners and wild-card qualifiers competing in best-of-three and best-of-five series, culminating in the Triple-A National Championship Game held annually in Las Vegas. Players on the 40-man roster of their MLB parent club can be optioned to Triple-A and recalled freely, making roster movement a constant feature of the Triple-A landscape.