SANTA CLARA Indicating they are not content with their backup quarterback situation, the 49ers will work out nine-year veteran Seneca Wallace this week, according to a league source.
Wallace (Cordova High School, Sacramento City College) last played in 2011 with Cleveland. He signed a one-year deal with New Orleans in April but was cut earlier this week after he threw an interception and fumbled against the Raiders.
Wallace, 33, originally was a fourth-round pick by Seattle. In 2010, he was traded to the Browns and served as current 49ers quarterback Colt McCoy's backup in 2010 and 2011. Eric Mangini, whom the 49ers hired as a consultant in the offseason, was the Browns' head coach when they traded for Wallace.
Neither McCoy nor Scott Tolzien has played well in the first two preseason games, prompting coach Jim Harbaugh to increase rookie B.J. Daniels' snap count in practice this week.
Harbaugh said McCoy will continue to be the No. 2 quarterback behind Colin Kaepernick on Sunday against Minnesota but has indicated Daniels will enter the game earlier than he did Friday in Kansas City.
Playing mostly against the Chiefs' reserve defense, Daniels finished 6 for 9 for 72 yards and a touchdown and had a 128 passer rating.
McCoy threw an interception, while Tolzien nearly threw two. McCoy has a 25.3 passer rating through two preseason games. Tolzien's is 56.9.
Harbaugh noted Wednesday that McCoy is learning a new offense this year.
"It's definitely a factor," Harbaugh said. " He's working at it very hard, it means a lot to him and it does to us, too. We're coaching him up the best we can and we'll keep striving for improvement each day."
Wallace has thrown for 31 touchdowns with 18 interceptions and posted an 81.3 rating in 21 starts. He may be most famous for a weaving 12-yard touchdown run with Iowa State in 2002. Unlike Kaepernick, however, he hasn't been much of a runner in the NFL. He's totaled 293 yards and has a 4.3-yard average.