FILE - Indianapolis Colts quarterback Philip Rivers (17) walks back to the huddle after a time out in the second half of an NFL football game against the Houston Texans in Indianapolis, in this Sunday, Dec. 20, 2020, file photo. On Wednesday, Jan. 20, 2021, the 39-year-old Indianapolis Colts quarterback announced his retirement. (AP Photo/Darron Cummings, FIle)

FILE - Indianapolis Colts quarterback Philip Rivers is shown on the sidelines during an NFL football game between the Colts and Baltimore Ravens in Indianapolis, in this Sunday, Nov. 8, 2020, file photo. On Wednesday, Jan. 20, 2021, the 39-year-old Indianapolis Colts quarterback announced his retirement. (AP Photo/Zach Bolinger, File)

Indianapolis Colts' Philip Rivers (17) throws a pass to Jack Doyle for a touchdown during the second half of an NFL wild-card playoff football game against the Buffalo Bills Saturday, Jan. 9, 2021, in Orchard Park, N.Y. (AP Photo/Jeffrey T. Barnes)

FILE - In this April 25, 2004, file photo, San Diego Chargers quarterback Philip Rivers, left, holds up his Chargers jersey with coach Marty Schottenheimer at a news conference in San Diego. The Chargers traded No. 1 draft pick Eli Manning to the New York Giants for Rivers and future draft picks. On Wednesday, Jan. 20, 2021, 39-year-old Indianapolis Colts quarterback Philip Rivers announced his retirement. (AP Photo/Denis Poroy, FIle)

Indianapolis Colts quarterback Philip Rivers (17) calls out to his teammates during the first half of an NFL wild-card playoff football game against the Buffalo Bills, Saturday, Jan. 9, 2021, in Orchard Park, N.Y. (AP Photo/Adrian Kraus)

Indianapolis Colts quarterback Philip Rivers (17) reacts during the second half of an NFL wild-card playoff football game against the Buffalo Bills, Saturday, Jan. 9, 2021, in Orchard Park, N.Y. (AP Photo/Adrian Kraus)