Oklahoma tight end Grant Calcaterra is retiring from football because of multiple concussions, including a recent one in practice.
Calcaterra announced his decision Thursday in a video posted on Twitter. He hasn't played since Oct. 5 against Kansas. The junior said in the video he's had his "fair share of concussions" during his career, and consulted with doctors at Oklahoma, and specialists around the country, before reaching the decision to retire. Calcaterra recorded five receptions for 79 yards this season.
"Football has been the biggest thrill of my life, and it kills me to know it's over," Calcaterra said on the video.