Before Masahiro Tanaka's first outing since coming off the disabled list, Brian Cashman felt a tinge of uncertainty.
Tanaka was unimpressive in two Triple-A rehab starts, and although minor-league results by rehabbing major-leaguers can be misleading, it doesn't mean they're irrelevant.
"It's hard to put stock in the results, but it's also hard not to have in the back of your mind: Is there something else happening there?" Cashman said Thursday afternoon during an appearance on SiriusXM's MLB Network Radio. "But then he came right out looking the way he did against the Mariners. He was in total command.