He replaces Prince Fielder, who is on the 40-man roster but is expected to go on the 60-day disabled list once camp opens.
That group doesn't include players still to be added, even if only on Minor League contracts. The Rangers often add players even after Spring Training officially begins, as they did with Ian Desmond and Jeremy Guthrie last year and Neal Cotts in 2013.
The Rangers are never done tinkering, but when they finally get to Opening Day, they will have to settle on a 25-man roster.