© 2013 MLB Advanced Media, L.P. All rights reserved.

03/10/2013 5:59 PM ET

Santos tests sore arm with bullpen session

DUNEDIN, Fla. -- Sergio Santos was back on the mound Sunday morning after being temporarily shut down earlier this week because of a minor right arm injury.

Toronto's right-hander last pitched on March 3 versus the Phillies before going down with soreness in his right triceps muscle. He was in a no-throw situation for four days before beginning light work off flat ground.

Santos took the next step in his return prior to Toronto's Grapefruit League game against the Yankees by throwing a bullpen session.

"It was so weird kind of how it happened because I felt fine Sunday against the Phillies, finished the game and felt fine," Santos said of the injury. "I came here and did all my shoulder stuff and it was that night that I felt something in my triceps, like a soreness.

"I think it was just one of those things of gearing up to upper 20s in pitches and I was kind of throwing my sliders with a little more intensity. That might have been the cause, I still really don't know."

Santos threw all three of his pitches -- fastball, slider and changeup -- during his session on Sunday. He is now scheduled to pitch in a Minor League game on Wednesday afternoon before resuming his role in Grapefruit League action.

The injury appears minor but considering how last season went for Santos, there was initial cause for concern. Santos appeared in just six games for Toronto at the start of the season before being placed on the 15-day disabled list with soreness in his right shoulder.

That stint on the DL was supposed to be relatively brief, but the pain lingered and Santos eventually had to undergo season-ending surgery. The Blue Jays didn't want to take any chances this time around and sent Santos for an MRI after he informed the club about his sore arm.

"I think it was more so for them," Santos said of the MRI. "But I'm kind of glad I did it anyways because it took all the thinking out of my head because now I know there's nothing structurally wrong. They can see it and I knew it was just a matter of time of resting and the inflammation [subsiding]."

Santos' progression will be welcomed with open arms by the Blue Jays, who can ill afford to lose their hard thrower. Closer Casey Janssen is already somewhat questionable for the start of the season because of his rehab from offseason shoulder surgery.

Bautista not convinced Team Canada did right thing

DUNEDIN, Fla. -- Don't count Jose Bautista among those who felt Team Canada was simply playing by the rules during Saturday night's controversial game versus Mexico in the World Baseball Classic.

Bautista was watching when Canadian catcher Chris Robinson bunted to lead off the ninth inning with his club up by six runs. Mexico took exception to the bunt and pitcher Arnold Leon then proceeded to hit Toronto's Rene Tosoni later in the inning.

That prompted an ugly benches-clearing incident, and while every run matters at the international tournament, Bautista still feels as though some of the game's ethics were violated by Robinson.

"I believe in the unwritten rules of the game," Bautista told reporters Sunday morning. "They should be respected. It's a code amongst players and everybody who plays baseball at a level higher than Little League knows what it is and there's no excuse."

The comments can be taken as somewhat controversial considering Canada needed to score as many runs as possible because of the tournament's rules. If the United States had lost to Italy on Saturday night, then there was a scenario in which three teams -- including Canada -- could have finished tied with a 1-2 record.

The tiebreaker then would have been based on run differential. In a regular-season game, bunting to lead off the ninth would have been considered a definite no-no, but Bautista felt the same guidelines should have been applied in this scenario as well.

It's a view that isn't necessarily shared by Blue Jays manager John Gibbons.

"The run differential matters," Gibbons said. "Everybody knows that, so it shouldn't really surprise anybody. If that determines whether you move on or not, I'm sure the other side would have probably done the same thing, I would think."

Gregor Chisholm is a reporter for MLB.com. Read his blog, North of the Border, and follow him on Twitter @gregorMLB. This story was not subject to the approval of Major League Baseball or its clubs.