Before he even steps into the batter's box or makes a catch, Alex Kirilloff will enter baseball's records books. 

The Minnesota Twins prospect will become the first player in league history to make his debut by starting a playoff game. Kirilloff, 22, is playing right field and batting sixth Wednesday against the Houston Astros in Game 2 of the AL Wild Card Series.

Kiliroff is just the third player to make his MLB debut in a postseason game – but the first two to do so came off the bench.