More than 50 innings for a pitcher and more than 130 AB for a position player
Brad Ziegler Oakland Athletics 2008 32 innings still going
The most innings pitched in a season by a rookie is 378 by Irv Young of the Boston Beaneaters (now Atlanta Braves) in 1905. Young pitched in 43 games, had 41 complete games, 7 shutouts, and a record of 20-21 with a 2.90 ERA.
In Major League Baseball, a player is considered a rookie if they've been on an Active Roster for 45 days, if a pitcher has pitched less than 50 innings or if a batter has less than 130 at bats.
You have to play one hole season, to not be a rookie anymore.
Babe Ruth's first year in MLB was 1914. There was no Rookie of the Year award at that time nor any rules and regulations as to how much a player could play before he lost his rookie status. In 1914, Ruth had 10 at bats and pitched 23 innings which, by today's regulations, would not have caused him to lose his rookie status. Therefore, it could be said that 1915, when he pitched 217 2/3 innings, was his rookie season.
To make sure he has a long and productive career. There is an overall master plan for the Washington Nationals' phenomenal rookie pitcher. Strasburg will start the first game after the All-Star break and pitch every fifth day until he reaches 160 innings. After that, he will sit for the rest of the season.
David Price. I guess he's still a rookie, right?
In the 1947 World Series, the New York Yankees started rookie pitcher Spec Shea and rookie catcher Yogi Berra in Game 1. In the 2007 National League Division Series (NLDS), the Philadelphia Phillies started rookie pitcher Kyle Kendrick and rookie catcher Carlos Ruiz in Game 2. There are probably others.
rookie pitcher on the Tampa bay rays