Dirk Koetter sends Austin Seferian-Jenkins off field during practice

Tight end Austin Seferian-Jenkins has missed 16 games during his first two NFL seasons because of injuries, but his absence from a portion of Thursday’s practice wasn’t related to his health. Greg Auman of the Tampa Bay Times reported that Seferian-Jenkins left the field in the middle of practice and Seferian-Jenkins was on Twitter while…