When the Washington Redskins used a fourth-round pick in the NFL draft in April on Michigan State quarterback Kirk Cousins, it gave them an unusual mix at the sport’s centerpiece position.  Now the team has some degree of investment in two rookie quarterbacks rather than just one. Robert Griffin III was taken with the second overall choice in the draft and already has been named theRex Grossman and Robert Griffin III during Thursday’s OTA session. (John McDonnell - THE WASHINGTON POST) team’s starter by Coach Mike Shanahan. And there might be room to wonder where Rex Grossman, the veteran who was re-signed by the club in mid-March as a free agent, fits in, especially if Cousins makes rapid practice-field progress as he learns the NFL game.  Grossman, though, had no complaints as he walked off the field Thursday at Redskins Park following an OTA session.  “I think it’s always a unique situation when you’ve got a high draft pick like that,” Grossman said. “And then you’ve got another rookie. It’s pretty unique. But it’s definitely not unheard of.”  Grossman gives the team a veteran presence at the position, with starting experience and knowledge of the offensive system. He still seems suited to being Griffin’s primary backup while Cousins learns the professional game.  Grossman was asked if he was surprised about the Cousins pick, and about his thoughts on what impact that selection might have on his role.  “Roles change every day,” Grossman said. “Some are more secure than others. But bottom line, you’ve got to go out and you’ve got to prove yourself every day and every year. There’s no guarantees in the NFL. I don’t care who you are. I think the quarterback position is no different than any other position on our team right now. It’s very competitive. There’s a lot going on. With 90 guys, there’s a lot going on.”  Grossman expressed no surprise about the early declaration that Griffin is the Redskins’ starter.  “I really don’t have any personal opinion on it,” Grossman said. “I just go out and try to play the best I can and go from there.”
If last year’s starter is upset by the arrival of not one, but two drafted quarterbacks, he’s not letting on.