There was some question today whether Brian Matusz could stay in the major leagues for the rest of the season and retain his rookie status for next season. The rules state that to be a rookie, a player must have fewer than 130 at-bats, 50 innings pitched or 45 days of major league service time.
Matusz will finish the season with 46 1/3 inning, but will have more than 45 days of major league service time by the time the regular season comes to an end. But Matusz will retain his Rookie of the Year eligibility for 2010 because -- for the purposes of determining who is a rookie -- only days spent in the major leagues during the time of the 25-man roster limit count. Matusz came up on Aug. 4, so he had only 27 days of major league service before the roster limit expanded to 40.