Sistema Peralta (Peralta system) is a baseball strategy where the pitching rotation in a 9-inning game is approximately divided amongst three pitchers throwing three innings each (3-3-3). Simply put, "one pitcher every three innings". This system contrasts with the more traditional strategy of having a starting pitcher, who handles the bulk of the pitching workload (typically over 5 innings), and reliever(s) who finish up the game (i.e. 5-2-2, 5-2-1-1, among various other combinations). It bears the name of entrepreneur and Tigres del Mexico founder Alejo Peralta who established and implemented its use with Tigres starting in the 1970s.