SANTA CLARA -- Mario Manningham was in good spirits Tuesday after the 49ers wide receiver participated in his first practice since tearing ligaments in his left knee last December.
"I'm just trying to get confidence back, stay right upstairs," Manningham said. "You can get caught up in not playing. Just trying to keep my attitude positive."
Tuesday was the first day players placed on the physically unable to perform list could participate in practice. The 49ers had a light walk-through and will have a full practice on Wednesday. Manningham expects to be a limited participant in that practice.
"Just taking it day-by-day, doing a couple periods," Manningham said. "Just trying to do what I've got to do to get back to 100 (percent). Just ease into it."
Manningham was second on the 49ers in receptions and third in receiving yards last year. He suffered the season-ending injury in the second-to-last game, the 42-13 loss at Seattle on Dec. 23.
Other than Anquan Boldin, receivers for the 49ers have combined for just 15 receptions through six games this season so Manningham would be a welcome addition when he returns.
"Just trying to stay in tune with what the team's doing," Manningham said. "It's hard to be in a meeting when you're not involved in it."
The 49ers have 21 days to decide whether to activate Manningham to the active 53-man roster. They play at Tennessee on Sunday, then travel to London to face Jacksonville before coming home for a bye week. It's unlikely Manningham would play in either of the next two games, but the Nov. 10 home game against Carolina could be a target.
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