‘When the Bills (2-1) host the high-powered Indianapolis Colts (2-1) Sunday, quarterback Rob Johnson will be missing one of his favorite receivers in Riemersma, a sure-handed 6-5 target who created great mismatches in the opponents’ secondary. If the game turns into a shootout between Manning and Johnson, the second- and third-ranked passers in the NFL, Buffalo’s hoping the dropoff between Riemersma and Collins is closer to stepping off a curb than a cliff. "He’s a great athlete, but he’s young," Johnson said of the 6-4, 250-pound Collins. "Jay’s the starter and one of the best tight ends in the league. Bobby’s been working hard, though. He realizes this is a great opportunity. But he’s got to get ready for a whole game instead of just spot play."’