SAN FRANCISCO -- With the left side of their infield banged up, the Giants added an insurance policy for the final week of the regular season. Veteran infielder Gordon Beckham was acquired Tuesday from the Atlanta Braves for minor league infielder Rich Rodriguez. The Giants also added a third catcher, Tony Sanchez, to the roster for the final homestand of the season.To clear a 40-man roster spots, the Giants designated left-hander Matt Reynolds for assignment and put outfielder Mac Williamson on the 60-day disabled list with a strained quad. Loma Fire Scorches 2,250 Acres, Evacuations Mandatory The Beckham move, which was set to be announced later Tuesday, gives the Giants needed infield depth. Eduardo Nuñez will miss two or three days with a hamstring strain and Brandon Crawford is playing through a dislocated left pinky finger. With Conor Gillaspie taking over at third base for the time being, the Giants would have been playing with just two backup infielders. Thus, the trade.Beckham, 30, is batting .217 in 273 plate appearances this season, with five homers. He has played second, third and shortstop for the Braves. Another Busy Wildfire Season by the Numbers "With what...