ESPN’s Stephen Holder reports
Colts coaches were impressed by Philip Rivers’ arm strength during his team workout. 
“He can still spin it,” a Colts official told ESPN. Another team source added, “I’d still take him at this stage over most 22- to 23-year-old [backups].” Rivers during his workout with the Colts threw on the run and worked the entire route tree. His familiarity with head coach Shane Steichen’s offensive system could land Rivers, 44, under center in Week 15 against the Seahawks. Riley Leonard is dealing with a knee injury and is considered week to week after subbing in for Daniel Jones (Achilles) in Week 14 against the Jaguars. Rivers — a recent grandfather — is not yet in typical NFL shape, however. “He needs to get in football shape, but there’s no question he can throw it,” a team source told ESPN. “Sources maintain that how Rivers handles his first week of practice will determine whether he plays Sunday.”
