The Colts held out running back Trent Richardson early in camp due to a slight hamstring injury. The wait paid off as Richardson "had an impressive week of practice" last week, reports ESPN.com.

"He’s getting back to 100 percent, so I think some of those runs you’re starting to see, the hard work, the full offseason, the comfort with the scheme, the terminology, being around the offensive guys, the guys that are lined up in front of him blocking and seeing him starting to put a foot in the ground, see a hole, burst through the line of scrimmage, all that stuff is coming," coach Chuck Pagano said. "It’s only going to get better, too, as he gets closer to 100 percent, health-wise. Again, he’s on track, he’s on track."

Richardson is obviously more comfortable in Indy's system, the report said. "He’s gone from thinking too much after taking the handoff to running off his natural instincts and with explosion."

The website says Richardson is "definitely" on his way to a better year after averaging 2.9 yards per carry last season.

"The comfort level is so much better now," Richardson said. "I know the plays and I’m not playing so tight. I’m really comfortable with the offense, and the timing with the offensive line is coming. I know all my cuts and reads before snap."