The Carolina Panthers placed rookie Tony Pike on season-ending injured reserve Friday and promoted second-year pro Keith Null from the practice squad in a swap of quarterbacks.
Pike, a sixth-round draft pick, wasn't unable to throw recently because of a sore right shoulder. He played in one game this season -- a Nov. 7 loss to the New Orleans Saints -- and completed 6 of 12 passes for 47 yards.
Null started four games as a rookie for the St. Louis Rams last season, throwing three touchdown passes and nine interceptions.
The Associated Press contributed to this report.