Nope, players have to be on the 25-man roster, the DL, the bereavement list, or the suspended list as of August 31. Not trying to be snarky, this is an honest question: How did David Price debut in September and pitch in the playoffs in 2008? http://www.baseball-refer...eda01.shtml?mobile=false http://sports.espn.go.com/mlb/playoffs2008/news/story?id=3622564 Troy Percival was hurt so David Price was his replacement.