Washington Redskins Coach Mike Shanahan was injured in a collision with a wide receiver and cornerback near midfield late in Monday’s organized team activity session. The hit left the coach “a little woozy,” according to a team spokesman, and Shanahan didn’t speak to reporters.

As the Redskins neared the end of their first practice session of the offseason, the team began 7-on-7 drills. Quarterback Robert Griffin III unleashed a long pass intended for receiver Pierre Garçon near the 50-yard line of their indoor practice facility, and both the wideout and cornerback Brandyn Thompson went up for the ball. Shanahan was standing with his back to the play, watching other drills.

Garçon and Thompson both collided with the coach as they tumbled to the ground, and Shanahan lay motionless on the field for several minutes.

“It was pretty bad looking,” inside linebacker London Fletcher said. “Obviously, you’re concerned about his safety. He wasn’t able to brace himself for the collision, either. His back was turned to the play. Definitely very scary feeling for a while out there.”

The team’s trainers tended to the 60-year-old Shanahan, and a cart was brought out to the field. But Shanahan, after being helped up, waved off the cart, and gingerly walked off the field.

Said Griffin: “he showed some toughness. That’s a benchmark for our team.”

Running back Evan Royster said seeing Shanahan go down reminded him of when his college coach, Joe Paterno , broke his leg in a sideline collision during a game at Penn State.

“It was scary, because I looked up and he took a pretty hard hit,” Royster said. “I’ve seen worse when I was at Penn State. Joe took a couple shots. So, it scares you, but Coach Shanahan’s a tough guy. He’s young, and he can take it.”

Other notes from today’s practice session:

• Griffin demonstrated a strong arm and looked at ease running the team’s offense. “I felt like I had pretty good command of the offense, knew where I was going with the ball.”

• Fletcher said he was impressed with Griffin, and that the quarterback doesn’t carry himself with the sense of entitlement “that a lot of high first-round picks” do.

• Tight end Chris Cooley — limited to just five games last season because of a balky knee — practiced fully, and appeared to run at full speed without any limitations.

• Defensive end Stephen Bowen (recovering from arthroscopic knee surgery) and receiver Leonard Hankerson (recovering from hip surgery) both went through exercises on the side with the Redskins’ training staff, but didn’t take part in any individual or team drills.

• Guard Kory Lichtensteiger (recovering from a torn MCL and ACL suffered last season) and running back Tim Hightower (recovering from a torn ACL) both ran through individual drills, but watched team drills.

• Of the 90 players on the team’s offseason roster, cornerback DeAngelo Hall was the only one not in attendance for Monday’s voluntary session. Fletcher said Hall has been a frequent participant at the team’s offseason conditioning program, which has been going on since mid-April.

• Receiver Santana Moss, who reported to the offseason program 15 pounds lighter than his playing weight last season, said he feels re-energized, and that he realized he needed to re-dedicate himself this offseason so he could continue to produce at a high level.

• The Redskins have tomorrow off, and will resume OTA practices on Wednesday and Thursday of this week. They have three sessions next week and three the week after that.