SAN FRANCISCO -- The Los Angeles Dodgers added a lot of well-paid, veteran relievers to their bullpen over the winter, but the most impactful addition might have shown up all by itself without any contract demands.Kenley Jansen's fastball came back.The closer's velocity has ticked up from the 92-to-95 mph range it inhabited last season when he was one of the most dominant relievers in baseball to 95-to-100 mph territory, a place few other pitchers inhabit.