Justin Blackmon

Despite significant contributions from three rookie receivers this season, the Jacksonville Jaguars are hoping Justin Blackmon will return in 2015.

General manager Dave Caldwell said Tuesday he's "hearing good things" about Blackmon, who is suspended indefinitely for repeated violations of the NFL's substance-abuse policy.

"We hope he comes back because we know he's talented," Caldwell said. "But we know he's also a good person that's fighting a tough battle. I think we have to treat it as a luxury. If he comes back, that's great. If he doesn't, we can't count on it."

Caldwell said in April he didn't expect Blackmon to play in 2014. He responded by drafting Marqise Lee and Allen Robinson in the second round and adding Allen Hurns as an undrafted free agent. The trio combined to catch 136 passes for 1,647 yards and nine touchdowns as rookies.

Blackmon certainly would bolster the unit, especially if veteran Cecil Shorts III hits free agency as expected. Blackmon voluntarily checked into a 90-day treatment facility earlier this season, and coach Gus Bradley said back then that updates from Blackmon's agent were positive. Blackmon was suspended without pay in November 2013 for at least a year for his latest violation. NFL rules prohibit coaches and general managers from having contact with players suspended indefinitely. Blackmon has already proved he has the talent, but would be a risky fantasy pick aside from a safer spot in the middle of the draft.