The San Francisco Giants have acquired outfielder Willie Calhoun, who was the main return for the Texas Rangers when they traded All-Star pitcher Yu Darvish five years ago. Calhoun was traded by Texas to the Giants for Steven Duggar on Thursday in a swap of outfielders who both bat left-handed and throw right-handed. It will be a homecoming for Calhoun, who requested a trade a couple of days after being sent to the minors by the Rangers on May 1.