The University of California Riverside announced recently that Troy Percival has resigned as the Highlanders head baseball coach. Percival, who was a longtime reliver for the Angels, said he is leaving to spend more time with his family and to guide and support his son Cole, a pitcher who recently signed a minor league contract with the Dodgers as an undrafted free agent.“I’ve decided to watch Cole play as he begins his professional journey with the Dodgers,” Percival said in a statement released by the university. “Our family is incredibly excited about this next step in his career and I want to be there to support him. This is the right time for me to step down from my current position.”Cole Percival, 21, had a 3.19 ERA and 63 strikeouts in 14 starts as a University of