Johnson sustained a strained groin during practice Tuesday, Scott Smith of the Buccaneers' official site reports.
Analysis:Johnson had to leave practice early Tuesday after picking up the injury. It's unclear at this point how severe the strain is or how long it will keep the second-year wideout sidelined. Any missed time in practice or preseason games could be a big deal for Johnson, as he's jockeying for pecking-order position with the likes of Jalen McMillan (knee) and Ted Hurst in the Bucs' wideout room.