The Denver Broncos on Tuesday played tight end Nate Jackson and center Tom Nalen on their reserve/injured list, Head Coach Mike Shanahan announced.
Jackson (6-foot-3, 235 pounds) is a fifth-year player who suffered a left groin injury in Denver's game against San Diego on Sunday. The tight end saw time in all five Broncos games (one start) this season, totaling three receptions for 34 yards (11.3 avg.) with one touchdown and placing second on the club with four special-teams tackles.
Jackson, who entered the NFL with San Francisco as a college free agent in 2002 from Menlo College, has totaled 16 receptions for 156 yards (9.8 avg.) with one touchdown in 31 career games (1 start). He also owns 15 special-teams tackles for his career.
Nalen (6-foot-3, 286 pounds) is a 14th-year player who suffered a right biceps injury in Denver's game against San Diego on Sunday. The five-time Pro Bowl selection started all five of Denver's games this season, helping the club rank fifth in the NFL in yards per game (365.2).
Selected by Denver in the seventh round (218th overall) of the 1994 NFL Draft from Boston College, Nalen ranks second in Broncos history in career starts (188) and third in career games played (194). He started every game for the Broncos during their back-to-back Super Bowl championship seasons from 1997-98.