"We had a need, and [Ranaudo] was the choice," manager Jeff Banister said. "Obviously we prepared him in Spring Training to be a starter. He is depth for us. We felt like of the options we had, he was the right choice."
Reliever Phil Klein was optioned to Round Rock after the game Tuesday to make room for Ranaudo.
Ranaudo, the club's No. 11 prospect, per MLB.com, made seven starts for the Red Sox last year and was 4-3 with a 4.81 ERA. He had a 5.02 ERA in four games this past Spring Training despite missing time because of an elbow issue. He was Round Rock's starter last Thursday, when they opened the season with a 2-0 victory. Ranaudo pitched five innings, allowing four hits while striking out six. He threw 76 pitches.
"I've felt good the last three or four times on the mound, physically and with my delivery," Ranaudo said. "I've thrown a lot more strikes down in the zone. I feel really good. I have some good confidence going into the game."
With three off-days in the next 10 days, Ranaudo might not be needed until April 28 after his start Wednesday. Banister said the Rangers haven't decided if they'll skip Ranaudo or use those off-days to get all their pitchers extra rest.
"After [Wednesday], we'll reassess," said the manager.
Klein pitched in six of nine games for the Rangers. One reason he was singled out is because he has options. Logan Verrett is a Rule 5 Draft pick, and Stolmy Pimentel is out of options.
T.R. Sullivan is a reporter for MLB.com. Read his blog, Postcards from Elysian Fields, and follow him on Twitter @Sullivan_Ranger. This story was not subject to the approval of Major League Baseball or its clubs.