The Orioles got a glimpse of the future on Saturday night with the organization’s top two pitching prospects, Dylan Bundy and Kevin Gausman, combining for five impressive innings on the road against the Boston Red Sox.

Albert Pujols knows that his home run in Saturday’s tilt against the Rockies is just one step in his recovery and not necessarily indicative of what’s to come. The slugger will keep working — he ran the bases for the first time this year at the Tempe Diablo Stadium complex following the game — in order to get back into peak form.

When Mariano Rivera walked into the pavilion just outside George M. Steinbrenner Field on Saturday to announce his retirement, he was followed closely by Derek Jeter and Andy Pettitte. While the rest of the team stood in one corner of the room, Jeter and Pettitte were the only two Yankees sitting down not far from Rivera as he announced that he would retire after the 2013 season.

It’s still more than three weeks until Opening Day and that’s a good thing for the Dodgers, as Matt Kemp and Carl Crawford will need it. Kemp went 0-for-3 with two more strikeouts Saturday and is now hitless in 11 at-bats with five strikeouts since left shoulder surgery.

Yankees captain Derek Jeter returned to the field Saturday for the first time since Game 1 of the American League Championship Series last October, going 1-for-2 as New York’s designated hitter in a 2-1 loss to the Braves.

Desmond Jennings left Saturday’s game against the Phillies due to a mild sprain of his left ankle. Jennings singled to left in the top of the third and went to second on left fielder Domonic Brown’s error. He injured his ankle while pulling into second.

Derek Jeter and Mariano Rivera made their Spring Training debuts on Saturday, but the Yankees fell, 2-1, to the Braves. Coming back from offseason surgery on his left ankle, Jeter went 1-for-2 with a sharp single to left field as the Yankees’ designated hitter. Rivera, who announced his decision to retire after the 2013 season Saturday morning, tossed a perfect fifth inning.

After escaping some first-inning trouble, Adam Wainwright cruised through 4 2/3 innings and the Cardinals blanked the Marlins, 2-0, on Saturday in front of 4,219 at Roger Dean Stadium.

Corey Hart still has a ways to go in his rehabilitation from knee surgery, but he found encouragement in being cleared to drive again.

Rangers CEO Nolan Ryan was back in camp on Saturday after flying back to Dallas for a meeting with co-owners Ray Davis and Bob Simpson. The meeting was designed to help clarify Ryan’s future with the Rangers.

Mariano Rivera knew when he reported to Spring Training that this season would be his last in a Major League uniform, that he would announce his retirement in advance and spend the rest of the year appreciating, and celebrating, the last chapter of his storied career.

Tim Lincecum comfortably threw 32 pitches Saturday in a simulated game as he passed the final test for resuming Cactus League activity.

Befitting a player who has done everything with grace, poise and precision, Mariano Rivera said all the right things on a difficult day. He said it was not a day of sadness, but it felt incomprehensibly sad for those of us who have had the honor of watching him pitch.

Marc Rzepczynski remains away from the Cardinals and on bed rest until at least Monday as he recovers from a freak left eye injury that he suffered during a golf outing with teammates on Friday.

It’s not as if the alarm needs to go off for Team USA, which is now in a must-win situation on Saturday night at Chase Field against a surprising team from Italy that is so far dominating the bracket.

Mexico enters Saturday’s World Baseball Classic game against Canada with serious momentum. Canada needs to steal it away in a hurry.

First baseman Adrian Gonzalez hit a two-run homer off R.A. Dickey in the third inning, giving Team Mexico an early four-run lead that Yovani Gallardo and company protected in a 5-2 victory over Team USA on Friday in the World Baseball Classic.