"Trent just needs to get healthy," coach John Harbaugh said. "I think the workload and the amount of work it takes to be a world-class conditioned athlete is something that he's working on right now. That's what he needs to understand, and that's where he needs to get himself."
The Ravens waited until April 18 to sign Richardson because they wanted him to get his weight down this offseason. Richardson, the No. 3 overall pick of the 2012 draft, has struggled with injuries and his conditioning over his three-year career, averaging 3.3 yards per carry. He was out of football last season after playing for the Cleveland Browns, Indianapolis Colts and Oakland Raiders.
Richardson, who will turn 26 in July, needs a strong offseason and training camp to find a spot in Baltimore's crowded backfield. The Ravens currently have Justin Forsett, Buck Allen, Kenneth Dixon, Lorenzo Taliaferro and Terrance West at running back.
"When he gets himself [in shape], he's got talent," Harbaugh said. "I'm very certain he'll get there. And when he does, we'll be able to evaluate him."
Also injured this offseason was wide receiver Michael Campanaro, who tweaked his calf a couple of weeks ago. Injuries continue to derail his career.
Since being drafted by the Ravens in the seventh round in 2014, Campanaro has been sidelined with injuries to his hamstring, quadriceps and back. He was placed on injured reserve last October after a magnetic resonance imaging test revealed a herniated disc.
"I've just never seen a guy work as hard as this guy has worked in the last year and a half," Harbaugh said. "There will be a time when he gets past this stuff. This stuff will stop happening, and hopefully it's training camp. We're still expecting really good things from him."