INDIANAPOLIS — Marvin Harrison's agent said Monday the Indianapolis Colts have agreed to release him in a salary cap move.

Harrison, who is second in NFL career receptions, turns 37 in August and is coming off the least productive non-injury-plagued season of his 13-year career. Cutting him could save the Colts about $6 million on next season's salary cap.

Agent Tom Condon said the receiver expects the Colts to make the announcement Tuesday or Wednesday.

The Associated Press left a telephone message seeking comment with Colts spokesman Craig Kelley.

Harrison caught 112 of his 128 career touchdowns from Peyton Manning, making them the top receiver-quarterback tandem in league history. Harrison has played his whole career with the Colts, but has increasingly become the team's second receiver behind Reggie Wayne.

Harrison has 1,102 career receptions, trailing only Jerry Rice.

The Colts are trying to re-sign several veterans, including three-time Pro Bowl center Jeff Saturday and running back Dominic Rhodes.