Sierra Vista’s Giovanni Rivera, the area’s leading rusher in 2010 with 2,304 yards, shocked Dons coach Don LeGro when he attended the first day of summer camp on Wednesday. Rivera was not with the Dons during the spring, and told Le Gro he was going to skip his senior season to concentrate on baseball. “We were thrilled when we saw his face,” Le Gro said. “What it does is take some of that talent we were going to use to replace him, and move it somewhere else. All along we were hoping that as we got closer he might change his mind, and when he showed up, it gave us a whole new outlook.”