07:56 AM ET 12.06 | This time, the quarterback change would be most welcome. The Steelers on Sunday appear ready to start their third different quarterback in four games. Ben Roethlisberger Sr. looks ready to go. Roethlisberger went through a full practice Wednesday for the first time since he left the Nov. 12 game against Kansas City with shoulder and rib injuries, and as long as there are no setbacks, he will make his first start in nearly a month against San Diego in Heinz Field. "I thought it was a positive day for Ben," Steelers coach Mike Tomlin said after practice. "He threw the ball around both vertically and horizontally. I thought the ball had good velocity, particularly in a few instances. It was positive. ... I saw him make the necessary throws."