New England Patriots quarterback Tom Brady said Monday morning it was hard to see former teammate and good friend Wes Welker sustain his third concussion in less than a year on Saturday and that he tries to do what he can to protect his own receivers.

"It's tough to see that happen and to a guy like Wes [Welker] who is one of my best friends," Brady said in his weekly interview on Boston sports radio station WEEI. "He is as tough as they come so you hate to see him go through those things, but to see it happen for the third time in a little less than a year is a tough thing.

"It's a tough thing for any player to deal with."

Welker took a hard hit to the head from Houston Texans safety D.J. Swearinger after making a catch over the middle in the second quarter of the Denver Broncos' 18-17 loss.

With smaller wide receivers Julian Edelman and Danny Amendola, who have a similar playing style to Welker, Brady knows head injuries are of a concern.