The southpaw Deduno, who impressed in Spring Training with what Rockies manager Jim Tracy calls a "wipeout" curveball, will be making his big league debut.
"I'm excited to be here," said Deduno, who hit the first ball he saw in batting practice over the center-field fence. "I've been waiting for this for a long time."
The 27-year-old was bothered with elbow soreness this year but went 3-1 with a 2.93 ERA and 29 strikeouts in 30 2/3 innings with Triple-A Colorado Springs. With the placement of reliever Manuel Corpas on the disabled list with a sprained ulnar collateral ligament, Tracy said Deduno likely will be used in long situations.
"He has two swing-and-miss pitches," Tracy said. "He's got a devastating breaking pitch. ... Now, can we get to that? Are we good enough where we can get to that and force guys to swing at it? That's what we're going to try to figure out."
With the placement of second baseman Clint Barmes on the bereavement list, the Rockies were also afforded the opportunity to recall Morales, who was 0-3 with a 6.75 ERA in 23 appearances this season entering the series opener against the Dodgers.
"He's had some success since we moved him back to Colorado Springs," Tracy said. "Franklin Morales goes a long way in dictating how I use him. You first create an opportunity for him so I can regain a feel as to where he's at. But command is the bottom line with Franklin Morales. If he throws the ball over the plate at 96 mph with the other pitches he has, he's got a real good chance to get you out."
Entering Friday, Morales had 18 walks and 15 strikeouts in 21 1/3 innings pitched this year.