Through the 2010 season, 40 by Neftali Feliz of the 2010 Texas Rangers. Through 125 games of the 2011 season, Craig Kimbrel of the Atlanta Braves has 37 saves and, barring injury or complete collapse by the Braves, should break the record.
The record for the most hits in a single season by a rookie is held by Ichiro Suzuki, who recorded 242 hits in the 2001 MLB season. The previous record was held by Shoeless Joe Jackson with 233 hits in 1911.
Dick "Night Train" Lane, with 14 for the LA Rams in 1952 (his rookie season).
yes, he already set rookie single-season rushing record (even better then Walter paytons rushing on his rookie season)
Terry Glenn set the single season rookie reception record with 90 catches in 1996. The record stood for 7 seasons, until the 2003 season, when Anquan Boldin of the Arizona Cardinals caught 101 passes. Anquan Boldin is the current record holder.
Tackles have been an unofficial stat for a long time. As a result, it is tuff to say who actually holds this record. Regardless, Willis had a fantastic rookie season and is still playing at a Pro Bowl level.
Through the 2008 season, that is Paul Quantrill who pitched in 86 games in the 2004 season.
As of the 2008 season, that is Ferguson Jenkins who struck out 274 batters in 1970.
Red Ruffing. Ruffing holds the Red Sox record for most losses in a season with 25 in 1928. His record that season was 10-25.
Dan Uggla of the 2006 Florida Marlins with 90 RBIs.
Jim Slaton who did it twice in 1973 & 1976.
Jim Slaton who did it twice in 1973 & 1976.
In MLB, that is Pud Galvin of the 1883 Buffalo Bisons with 75 (record was 49-26).