The 49ers rookies joined the veterans for "football school" workouts.
San Francisco 49ers quarterback Colin Kaepernick is one of four current NFL stars remaining in the competition to grace the cover of EA Sports' Madden NFL 15 video game.
Kaepernick, a No. 2 seed on one side of the bracket, beat No. 7-seeded Philadelphia Eagles quarterback Nick Foles in the first round of voting and No. 6-seeded Carolina Panthers linebacker Luke Kuechly in the second round. Kaepernick received 57 percent and 58 percent of the online vote in his respective victories.
In round 3, better known as the seminfinals, Kaepernick faces Seattle Seahawks cornerback Richard Sherman.
Fans have until May 30 to vote Kaepernick into the final round of the tournament.
Panthers quarterback Cam Newton and Indianapolis Colts quarterback Andrew Luck face each other in the other semifinal matchup.
For fans wondering what Kaepernick would look like throwing a touchdown pass to new receiver Stevie Johnson, 49ers Studios producer Michael Blevins demonstrated the future connection via his Madden NFL 14 gaming system.