SCOTTSDALE, Ariz. >> Buster Posey is healthy again and back behind the plate. Brian Wilson is back on the mound. Freddy Sanchez is back from shoulder surgery, eager to start turning double plays again. Aubrey Huff, he’s just back in shape.

Back together again as a full unit after an injury-plagued 2011 season derailed San Francisco’s hopes of repeating as World Series champions, these rejuvenated Giants expect to challenge the defending NL West champion Diamondbacks.

New center fielder Angel Pagan understands the significance of San Francisco being at full strength and plans to do his part to complement the Giants’ key returners.

Posey is set to hit live batting practice Sunday for the first time since his season-ending collision at the plate May 25.