Jansen is 5-1 with a 1.35 ERA in 28 appearances between Class A Inland Empire and Double-A Chattanooga. He's averaging nearly 15 strikeouts per nine innings.
"We've talked about him -- I really liked his personality in the spring," Dodgers manager Joe Torre said. "I think at some point this year you'll probably see him. I may be talking out of school there, but we've talked enough about him that I think by September, if not before."
Left-hander Scott Elbert is in Arizona playing catch, Torre and Dodgers bullpen coach Ken Howell said. Elbert was given permission to leave Triple-A Albuquerque in June after he was apparently unhappy with a demotion from the big leagues and has not pitched in a Minor League game since.
"He's been playing catch in Arizona," Howell said. "I spoke with him once, as far as I know he's just taking it one day at a time, going slow. That's where they're at right now."
Howell said there was nothing physically hindering Elbert.