Buster Posey and Brandon Belt had an on-field tiff Saturday night - MLB

The Giants beat the Cardinals on Saturday night, but there was some grumpiness between a couple of Giants players all the same.

As Hank Shulman reports, late in the 13-inning game Fox TV cameras caught catcher Buster Posey yelling at first baseman Belt after Stephen Piscotty of the Cardinals stole second base. Then, after the final out, there was a brief, cold stare down between the teammates. The issue would appear to be Posey being upset with Belt for not holding Piscotty close at first base and then Belt being upset with Posey for calling him out in front of God and the fans and the TV cameras and everyone.

Neither Posey nor Belt would talk about it to reporters afterwards or on Sunday, saying the matter was between them and that they’d deal with it privately. Which is a smart move.

Of course, if Posey heeded that advice beforehand and took up his dissatisfaction with Belt in private, the reporters wouldn’t have even known about it in the first place.

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Houston Astros star Jose Altuve had surgery Wednesday on his broken right thumb, an injury that occurred in the World Baseball Classic and will significantly delay the second baseman’s 2023 debut.

The Astros announced that the 32-year-old Altuve had the procedure done in Houston and will stay there to begin his rehabilitation, with only one week left in spring training. The Astros will fly there on Sunday following their final Grapefruit League game in Florida, before playing a pair of exhibitions against their Triple-A team, the Sugar Land Space Cowboys, in Texas.

Altuve was hit by a pitch on Saturday while playing for Venezuela in the WBC. He might not be ready to return to the lineup until at least late May. The eight-time All-Star and 2017 American League MVP batted .300 with 103 runs, 28 homers and 18 steals for the World Series champion Astros last season. Mauricio Dubón and David Hensley are the leading candidates to fill in for Altuve at second base.

Altuve isn’t the only Major League Baseball star who was hurt in WBC play, of course. Mets closer Edwin Díaz will miss the 2023 season because of a torn patellar tendon in his right knee as the freak result of an on-field celebration following a WBC win by the Puerto Rico national team.

BROWN DOWN

The Astros also scratched right-hander Hunter Brown from his scheduled start Wednesday against the Mets in Port St. Lucie, Florida.

Manager Dusty Baker told reporters that Brown, who is ranked by MLB as the organization’s top prospect and competing for the last spot in the rotation, has discomfort in his lower back.

NOT QUITE READY

The New York Mets sent catcher Francisco Álvarez to Triple-A Syracuse, quashing for now the possibility of putting the prized 21-year-old on the opening day roster.

Álvarez, who made his major league debut with the Mets near the end of last season, had just three hits in 28 at-bats in Grapefruit League exhibition games. Ranked by MLB as the third-best prospect in baseball, Álvarez batted .260 with 27 homers and 78 RBIs in a combined 112 minor league games in 2022 at Double-A and Triple-A.

The Mets have newcomer Omar Narváez, a 2021 All-Star with the Milwaukee Brewers, as their primary catcher with Tomás Nido likely to play mostly against left-handed pitchers.

Speaking of the Mets, Díaz turned 29 on Wednesday – a rather subdued milestone for the right-hander considering his situation. Diaz nonetheless posted in Spanish an upbeat message on his Twitter account, thanking God for another year of life and describing his health as good and his outlook as positive in this initial stage of the roughly eight-month rehabilitation process.