NASHVILLE, Tenn. One of the hallmarks of Bruce Bochy’s succe s with the Giants en route to winning three World Series has been the way the future Hall of Fame manager has handled his bullpen’s workload. Keeping relievers fresh through the season has allowed them to work to their full potential in stretch runs and into October.Only nine Giants pitchers in Bochy’s nine seasons in San Francisco have appeared in as many as 70 games in a year, and among those only closer Brian Wilson in 2010 and George Kontos in 2015 threw as many as 70 innings. Only four times since 2007 including Wilson twice before he blew out his elbow has a Giants reliever thrown as many as 1,200 pitches in a season, something 10 major league relievers did in 2015 alone.MORE: The 13 worst December trades, ranked | 10 highest-paid playersOne of the keys to Bochy’s avoidance of overworking his bullpen has been to employ pitchers like Yusmeiro Andre Dawson Jersey Petit, who made 41 relief appearances and one start in 2015, pitching 76 innings. The year before, Petit threw 117 innings in 27 relief outings and 12 starts. He was a playoff hero in 2014 with his six innings of one-hit ball in the 18-inning Game 2 of the division series in Washington, a 2-1 win for the Giants.Petit was not tendered a contract offer by the Giants and becamea free agent. The Giants will mi s him.This guy did some remarkable things in the role that he had, to go in a playoff game like that, on the road, Bochy said Tuesday at the winter meetings. I mean, one mistake, the game’s over, and to give us that kind of effort is something I’ll never forget. You have to have a guy in the bullpen that you can use like that. They save the other guys. They really help keep your bullpen freshened up. If you don’t have that guy, then you end up really running all of them in the ground, and he was that guy for us.MORE: Maddon ‘jacked up’ for Cubs-Cards rivalry | Rox skipper says team needs to make own ‘bold move’The exception to that is if you have a rotation with five workhorses, which is part of how Bochy previously kept his bullpen fresh. The 2012 Giants are the only team this decade to have all five of its starters work at least 180 innings, while the 2010 Giants had four starters work at least 190 innings, plus a combined 169 from Todd Wellemeyer and the rookie who replaced him in the rotation that June, a 20-year-old named Madison Bumgarner.While Bumgarner and Jeff Samardzija will be counted on for big innings in 2016, expecting the same from Matt Cain and Jake Peavy as they bounce back from injury-riddled 2015 campaigns is not something the Giants can claim. Chris Heston currently slots in as the Giants’ No. 5 starter, but if San Francisco adds another rotation arm, Bochy admitted it is po sible that he could slide to the Petit role.Chris Jose Fernandez Jersey (is) competing right now as a starter, Bochy said. But, sure, a guy like that can be an option. Really depends on what we end up doing.Heston seems a good candidate because like Petit, and like another famous practitioner of the swingman role, Ramiro Mendoza, it took a long time for him to stick in the major leagues for Heston, it was just this past season, at the age of 27, that he had his first full year Starlin Castro Jersey in the bigs. Knowing both the value of a roster spot and the value that a pitcher can have to his team even in a role that does not produce gaudy statistics is key to having the mentality to do the job.It’s not an easy role, Bochy said. You’re so close to being the fifth starter, and it’s only human for these guys to want to do that because it probably helps their career. It takes an unselfish player to do that role and accept that role, and the only way you’re going to be good at it is to accept it, which (Petit) did. And part of it was, you know, Yusmeiro went up and down. I know he wanted to stay in the big leagues, and sometimes it’s the second or third time when you go down, you just want to be in the big leagues and you learn to appreciate it a little more, and that’s what I saw from him.The reward can be obvious. Petit may never be a star, but he left San Francisco with a ring and a permanent place in Giants lore for how well he did his job. That job is now open, and Bochy knows how important it will be to fill it.