One of the themes for the Giants this spring is caution with an older team. Pitchers are not being rushed onto the mound and regulars are getting ample time to prepare their bodies for the season’s rigors. Buster Posey has not played, partly because of what manager Bruce Bochy termed an ankle “tweak.” Shortstop Brandon Crawford and center fielder Austin Jackson will not play until Thursday to ensure that Crawford’s right shoulder and Jackson’s legs are ready. Posey was better Saturday and took batting practice in Scottsdale. Crawford routinely develops right-shoulder stiffness early in spring training. Bochy said Crawford’s shoulder and Jackson’s legs are fine, and the staff wants to keep it that way. Hunter Pence, Joe Panik and Evan Longoria will debut Sunday, with Longoria the DH. Andrew McCutchen and Pablo Sandoval will make their second starts. Bench coach Hensley Meulens will manage. Bochy is going to San Diego for a memorial service for former major-league GM Kevin Towers.