And the mystery continues.

Roy Halladay sat at his locker Tuesday morning, fresh off eating breakfast. He looked skinny. And, considering Halladay’s last three or so days, holding down breakfast might have been a big accomplishment.

Two days earlier, Halladay ignited a storm of worry by leaving his start after just one inning of work. Both the Phillies and Halladay said it was a stomach virus.

“I feel like I’m going in the right direction,” Halladay said. “Just bad timing for a setback.”

The timing was worse than bad. Five days earlier, Halladay endured his worst outing of the spring, a 22/3-inning, six-run clobberfest courtesy of a Detroit Tigers lineup composed mostly of backups.

Skepticism arose, especially after his injury-plagued 2012 season. Was Halladay just getting old? Were his shoulder problems from last season evolving into chronic ailments? That remains to be seen.

For what it’s worth, both Phillies pitching coach Rich Dubee and catcher Erik Kratz said Halladay’s stuff was light years better in his 25 pitches Sunday than his outing against Detroit.

“I saw a better arm slot,” Dubee said. “Not on a consistent basis, but more often. And for me what was more impressive was he was able to get that arm slot with nothing in his body and no legs at all. That was encouraging.”

The man known as “Doc” threw long toss on Tuesday, Dubee said, and is expected to throw a bullpen today, which is an off day for the Phillies. He will start Saturday’s game against the Orioles if all goes according to plan.

“I felt really good about it after my last bullpen,” Halladay said. “I wanted to see where it was at in the game. I got to see it a little bit but not as much as I wanted to. I feel like I’ve made the strides I need to make, I just haven’t gotten tested.”

His test is what we wait on. Halladay, like countless fans, admitted he’s eager to see how he feels come Saturday.