Veteran quarterback Russell Wilson didn’t participate in the Pittsburgh Steelers’ first practice of training camp on Thursday, with Justin Fields taking the first-team reps.

Coach Mike Tomlin told reporters after practice in Latrobe, Pa., that Wilson had calf tightness and is day-to-day. Tomlin said Wilson wanted to practice but coaches told him to take the day off.

Wilson, 35, stood to the side wearing his No. 3 jersey and a baseball cap and observed as Fields took part in the drills. After practice, Wilson got in some work with the wide receivers and tight ends.

The Steelers moved on from starter Kenny Pickett in the offseason, acquiring Wilson and Fields to fill the position.

On Wednesday, Tomlin reiterated Wilson, who won a Super Bowl with the Seattle Seahawks, was entering camp as the No. 1 QB over Fields, 25, the 2021 first-round draft pick of the Chicago Bears.