Chirinos began the season with a sprained right ankle, and that didn't go well. He was 4-for-31 at the plate and then missed the past two games because of his injured left ankle. The Rangers decided not to have Chirinos trying to push through the injuries.
"I was concerned about Robbie since the beginning of the year," manager Chris Woodward said. "I know that he wasn't fully healthy. He came back and you could tell offensively he was having a hard time. Catching-wise, he was having a hard time, and then he hurts his left ankle. The last two games ... he was not even close to being available."
The Rangers will give Chirinos time to get back to full strength. Jeff Mathis, who is 37, takes over as the No. 1 catcher, and the plan is for him to start on Friday and Sunday. Trevino is expected to start on Saturday.
Trevino was 1-for-4 in two games when the Rangers were carrying three catchers and 6-for-25 during the Summer Camp intrasquad games. He has been hitting in simulated games since being sent to the alternate training site.
"I don't want to kill Mathis," Woodward said. "I think Trevino's earned a right to get a better look. With the live ABs on the other side, he's in a really good place right now. I envision, if he starts to hit really well, he might get some more playing time.
"Not because I don't believe in Mathis. It's just because of Mathis' age and he hasn't been hitting every day. It's unfair to ask him to do that now. I'm looking forward to watching these guys compete."
End for Vólquez?
Right-hander Edinson Vólquez strongly thought about retiring before deciding to sign a Minor League deal with the Rangers this winter. He also thought about hanging it up while baseball was shut down for three months.
Vólquez ended up pitching in seven games for the Rangers before sustaining a strained right oblique muscle and has been placed on the 45-day injured list. Going on the 45-man IL means Vólquez is not eligible to come off until the final day of the regular season.
"I hope there's a chance he could come back, because he's meant so much to our club, off the field and on the field," Woodward said. "I feel terrible. ... I hope it's not the end for Eddie, because what he's done to help our organization. I hope that even though he's hurt, he can still be around, because he's such a good presence for us."
The Rangers called up veteran right-hander Juan Nicasio to replace Vólquez in the bullpen. Nicasio had a 4.76 ERA in four intrasquad games during Summer Camp. Woodward said there has been some fierce competition at the alternate training site.
"Nicasio's throwing pretty much mid-90s every time, which first time in Spring Training in camp, he was 92-93 [mph]," Woodward said. "Now, it's up to the 95s. And he's a strike thrower. The one thing that we know from his past history is that he throws the ball over the plate. And right now, that's what we need."
• Woodward went back to Rougned Odor at second base Friday even though Derek Dietrich had three hits in his Rangers debut on Wednesday. Woodward is hoping Odor made some adjustments during his time off Wednesday. The manager said he is planning to start Dietrich both Saturday and Sunday, although not necessarily at second base.
Both players contributed to the Rangers' 3-2 victory over the Rockies. Odor delivered a game-tying single in the seventh inning, and Dietrich scored the go-ahead run in the eighth after reaching base on a hit-by-pitch as a pinch-hitter.
• Outfielder Danny Santana, who is on the injured list with a sore right arm, is with the Rangers this weekend in Colorado and is close to being activated. Santana's arm is not strong enough to return to the outfield, but he could be an option at either first or second base.
• The Rangers' five-man taxi squad in Colorado consists of catcher Tim Federowicz, infielder Anderson Tejeda, outfielder Leody Taveras and pitchers Luis Garcia and Kyle Cody.