Players on the Texas Rangers’ spring-training roster began showing up at the Surprise Recreation Campus last week to prepare for another 162-game go-round in 2014.

Missing, though, is left-hander Derek Holland, who won’t be leaving behind the friendly confines of Dr. Keith Meister’s TMI Sports Medicine facility in Arlington for another week.

That leaves one spot in the starting rotation wide open, and the other four held down by:

1) Yu Darivsh, a Cy Young runner-up who finished last season with nerve inflammation in his lower back.

2) Matt Harrison, an 18-game winner in 2012 who pitched only twice in 2013 because of a herniated disk .

3) Alexi Ogando, 19-12 in his career as a starter but a resident of the disabled list three times last season.

4) Martin Perez, who pitched a career-high 167 2/3 innings last year, 124 1/3 of which came in a 19-start stretch from June 22 to Oct. 1.

So, as pitchers and catchers report Sunday, signaling the beginning of another spring camp and another baseball season, no one issue is as big as the starting rotation and no one player is as important to the Rangers’ success in 2014 as an able-bodied Harrison.

An able-bodied Ogando is running a close second.

“This is a big hurdle I have to take on, physically being back the same way I was before,” Harrison said. “That’s going to be tough, but I’ve done everything possible to get back to 100 percent and be ready for our season. I guess time will only tell once I get back in some game action.”

The Rangers have been vastly improved on the mound in recent seasons, ranking among the league’s best, and Darvish has been as good as the Rangers expected he would be when they plucked him from Japan two years ago.

The offense received a boost with the acquisitions of first baseman Prince Fielder and left fielder Shin-Soo Choo, but the club needs Jurickson Profar, among others, to show more in the bottom half of the lineup.