Paulino recently threw off the mound, and according to Astros assistant general manager Dave Gottfried, the right-hander didn't feel pain, "but he's still just not right."
Paulino has worked all season to recover from a pinched nerve in his upper right arm, but in his first Minor League rehab outing a couple of weeks ago, he left early with shoulder soreness unrelated to his prior injury. He has not appeared in a game since.
In other Minor League injury news, highly touted righty Brad James has missed more than a month with a lower back stress reaction. The club has hopes the Double-A hurler will pitch again before Corpus Christi's season ends on Sept. 1. James is 6-6 with a 4.55 ERA over 17 starts this year.
Veteran infielder Tomas Perez is done for the year with a hamstring injury, which is why he didn't receive a promotion to the big leagues when Kazuo Matsui went on the disabled list.
Righty Paul Estrada continues to make progress in his comeback attempt from a shoulder injury. He pitches every other day in relief for Double-A Corpus Christi, throwing one inning and approximately 25 pitches in each outing.
Estrada, who if healthy will compete for a spot in the Astros' bullpen next spring, has allowed one earned run over 4 2/3 innings, spanning five appearances.
"He feels good," Gottfried said. "Each outing gets a little better. He was tentative at first, but most guys are when they're coming back [from injury]. He feels good and that's positive. To finish the season that way gives him and us something to build off of."
Alyson Footer is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.