Oakland Raiders wide receiver Jerry Porter made news Tuesday by demanding a trade. He was held out of Wednesday morning’s practice with a strained calf injury.

“That’s a non-issue as far as I’m concerned,” said coach Art Shell, when asked about Porter’s trade request. “I’m not even going to discuss that. I’m focused on getting our football team ready to play. I want anybody that can help us win football games.”

Porter, who spoke to the San Francisco Chronicle in a story Wednesday asking the Raiders to trade him, caught 76 passes for 942 yards with five touchdown receptions last year.

Janikowski is accurate

Kicker Sebastian Janikowski connected on a 56-yard field goal in practice yesterday.

“The pressure’s on him. I told him every time he misses, the team runs, so that’s the pressure that he has,” said Shell. “Sebastian’s in good shape. He came into camp with his weight down, the way it needs to be. He’s got a very strong leg, as you know.”

Day 2 of practice

Shell was pleased with the way Wednesday’s morning practice went at Redwood Middle School.

“The first day always is a tough day for players. You come back and some of them are hyper and excited about it, and you can get tired very quick. I thought it was much better (Wednesday) morning. I thought the tempo was much better. The excitement was there. The energy level was there.”

Defensive backs spent part of practice hitting a single blocking sled and driving it into the ground. ... The defense and Aaron Brooks made contact near the goal line on a quarterback draw. Several of the defenders gave Brooks a friendly slap on the helmet when he got up.

Global appeal

For the third straight year, the Raiders’ training camp will have an international flavor as the Silver and Black have invited three international coaches to join Shell’s staff during summer workouts. Patrick Esume of Germany, Radames Carrillo of Mexico and Tang Hai-yan of China will attend Raider practices and team meetings.