Mattingly to keep eye on Jansen's workload

PHOENIX -- Dodgers manager Don Mattingly said he's more concerned with Kenley Jansen's recent workload than his recent ineffectiveness, implying the former might be responsible for the latter.

Despite throwing harder than last year, Jansen struggled in both Detroit games this week, which Mattingly pointed out brought his appearance total to four straight games (with two off-days). That included Saturday, when he was brought in with a five-run deficit because short starts by Hyun-Jin Ryu and Paul Maholm in back-to-back games left the bullpen to pick up 11 2/3 of 18 innings.

"When the starters don't go deep into games, it gets the bullpen," Mattingly said. "It puts stress on everybody. There's a couple guys we'll pay close attention to."

Mattingly put J.P. Howell in that category with Jansen. But he said a secondary concern with Jansen is his confidence.

"The worry with Kenley is only that his confidence is shaken," Mattingly said. "It's not his stuff -- he's throwing hard -- or what he can do. One thing as a manager, I remember seeing Mariano [Rivera], it's like if he gives it up one night, the next time he's shaky, too. I want Kenley to feel it's just a hiccup. I don't want him to worry about it."