Ross was invited to big-league camp Tuesday.
Ross joined the Rangers on a minor-league deal in February but had spent the start of camp working out with the team's minor-league rehab group as he built himself back up to speed after opting out of last season. He could factor into the Rangers' rotation picture at some point this season but is unlikely to be an exciting fantasy option, as he's now 33 and has posted just one season with an ERA under 6.00 in the last five years.