Has appeared in 52 games with 18 starts over four seasons with Miami (2010-12) and Oakland (2013), grabbing seven receptions for 96 yards (13.7 ypr)... Last season (2013), Mastrud started 12-of-16 games played hauling in six receptions for 88 yards (14.7 ypr).
Chicago Bears Network's Jeff Joniak interviews defensive tackles Ego Ferguson and Will Sutton about their special bond on and off the field.
Anthony 'Spice' Adams plays the 'Whisper Challenge' game, where fans wear noise canceling headphones and try to guess what Spice is saying.
Former Bears linebacker Brian Urlacher is back at Halas Hall for a reading of his new children’s book, "The Middle School rules of Brian Urlacher."
Jeff Joniak wraps up media availability at the NFL Combine in Indianapolis.