Opportunities for undrafted free agents can prove fleeting. One moment they have a chance to show what they can do, and the next they're handed an airline ticket home.
The Bears saw enough promise to keep Roy Robertson-Harris around all last season, even though a serious heat-related illness he suffered in July before reporting to training camp wound up sidelining him for the entire season.
Now Robertson-Harris is trying to adjust to a new position. He moved from outside linebacker to defensive end in December, when all he could do was work out in the weight room and attend meetings.
The former UTEP Miner came in at 6-foot-7, 265 pounds last year, and a season spent...