"He's just in that progression," Scioscia said before Sunday's series finale against the Twins. "He's got a ways to go. It's a controlled progression, so he's got a little ways to go before he's on the mound. What the timeframe will be, we're not sure."
Heaney started on April 5 against the Cubs, allowing four runs in six innings to go with seven strikeouts. But he complained of tightness in his left forearm and was placed on the disabled list the following day.
Last year, Heaney was 6-4 with a 3.49 ERA in 18 starts in his first season with the Angels, who acquired the former first-round Draft pick from the Marlins.
Brian Hall is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.