Blackmon, who suffered an ACL tear in December, was placed on the Active/Non-Football Injury list, Mike Chappell of Fox 59 News Indianapolis reports.
Blackmon was hoping to receive medical clearance to begin practicing by July, so it's not clear if this is a setback. More likely, he'll begin training camp on the roster exemption and then will be activated when cleared to practice. He isn't expected to be able to play in a game until October at the earliest.
Blackmon, who suffered an ACL tear in December, may not be ready to play for the Colts until several games into the 2020 NFL regular season, WFNI 1070 am Indianapolis reports. "We know he probably won't be ready until late August/early September, which means that he might not really help us until October," said GM Chis Ballard.
Ballard said Blackmon's versatility that allows him to play safety, corner and in the slot was worth the time he'll miss for his recovery. Blackmon is hoping to receive medical clearance to begin practicing by July.
The Colts selected Blackmon (knee) in the third round of the 2020 NFL Draft, 85th overall.
Blackmon (6-foot-1, 187 pounds) suffered an ACL tear in December, so the Colts' investment of a third-round pick represents a considerable vote of confidence. Blackmon is a former corner who's particularly noted for his coverage skills after standing out in Utah's dominant defense. While his rookie-year impact might be muted due to his recovery, the Colts are clearly fond of Blackmon as a long-term prospect.