SCOTTSDALE, Ariz. — Opportunity. That was the word of the day when Buster Posey and Tony Vitello answered questions on Tuesday about the composition of the Giants’ bullpen. Opportunity, opportunity, opportunity. “I think there’s opportunity for a lot of guys. I think that’s the first thing that comes to my mind,” Posey, the team’s president of baseball operations, said. “So, when you have opportunity, it’s exciting to me to see who wants to grab that opportunity and run with it. … I think bullpens are the one piece of the team sometimes that is really hard to predict — good or bad.” Trades and injuries almost sapped the Giants’ bullpen of its strength by the end of last season. Camilo Doval...
