won't be able to come up in the 9th unless jays already won game.
say score 2, 2 out, that's 4 batters. would need to then have bases loaded for george to come up again. anything else, he doens't come up in the 9th. any other hits/walks, jays win, any other other outs, either goes extra or jays loose. so strategically makes sense to replace a slower runner at this stage of the game where if anyone after had hit a single, he could have scored from 2nd.