Shortly before Rapoport relayed a diagnosis, The Athletic's Zak Keefer described the moment Fountain suffered the injury during the Colts' joint-practice with the Cleveland Browns:
The 23-year-old was selected by Indianapolis in the fifth round of last year's draft out of Northern Iowa.
Fountain did not log a reception as a rookie, as he spent most of last season on the Colts' practice squad before appearing in the team's two playoff games. In Indianapolis' 24-16 loss to Buffalo on Aug. 8 to open their 2019 preseason, Fountain led all receivers with five grabs for 63 yards.
"Really what I'm really impressed with Reece is that he's starting to show more consistency," Colts offensive coordinator Nick Sirianni told Andrew Walker of the team's official website Tuesday. "He's got that body that you want from a receiver. He's big, strong and physical. Now he's starting to get a little quicker."
Fountain added to Walker that he felt his work in the offseason to reshape his body was paying off, and the results had been evident in training camp:
With this setback, Fountain will have a longer road ahead of him to obtain an active roster spot. Another receiver looking to earn playing time is rookie Parris Campbell, who the Colts picked in the second round out of Ohio State. Campbell, like Fountain, has been experiencing setbacks with a hamstring injury.
From the Colts' perspective, the team will continue to lean on the likes of T.Y. Hilton, Devin Funchess and Chester Rogers at the position entering the regular season.