SAN FRANCISCO — A day after an erratic outing where his velocity noticeably dropped, the Giants placed right-handed José Buttó on the 15-day injured list with right arm fatigue.

Right-hander Blade Tidwell, who played under Tony Vitello at Tennessee, was called up in a corresponding move.

“I think looking back on it, I think he had an opportunity to maybe communicate some stuff to us, and we also had an opportunity to see things a little quicker,” said manager Tony Vitello. “Other than that, I feel like we’re in a decent spot. He’s had some issues that he’s familiar with. Right now, it’s just a strain and he’s going to get checked out. So, I’m hoping for best-case scenario which, I know for him personally, is to be available to pitch in a day or two. But hopefully, we’ll get to that point sooner than later.”

Buttó, 28, faced eight batters and recorded just one out in his relief appearance against the San Diego Padres on Wednesday afternoon, allowing four runs and walking four batters. The right-hander’s velocity was concerningly low, and he barely touched 90 mph by the end of the day.

Last month, Buttó helped Team Venezuela win its first World Baseball Classic title alongside second baseman Luis Arraez, pitching a scoreless inning in the final against the United States. When Vitello was asked about the potential impact of the WBC, he responded that every instance is case-by-case.

“I also think it’s going to be hard to identify that. Because if you’re not throwing in one spot, you’re throwing in the other — and vice versa,” Vitello said. “I’m well-aware which one’s more intense. … So, it’s hard to exactly quantify, but it is something that you could come up with theories. My biggest concern is I just don’t want worst-case scenario with him, where he’s out for a big long period of time.”

Along with Buttó, two-time All-Star Logan Webb made two starts for Team USA, allowing one run over 8 2/3 innings. Webb has allowed nine runs over 11 innings (7.36 ERA) with 12 strikeouts to five walks in his first two starts, but doesn’t believe the WBC has impacted him.

“I was waiting for that question,” Webb said on Tuesday with a smile. “No, I don’t think so. I signed up for that. It’s what I chose to do. There’s some different travel and different atmospheres that I went through — adrenaline — but if I was tired, hypothetically, it’s my own fault. I feel great right now. It’s not that. Like I said, I think I’m a little off. I’m trying to figure it out as we go. Luckily, it’s a long baseball season.”

Tidwell and outfielder Drew Gilbert were acquired last July by the Giants in the trade that sent Tyler Rogers to the New York Mets. The right-hander made his major league debut with the Mets last season, allowing 15 earned runs over 15 innings in four appearances, but he has yet to appear in a game with the Giants.

“Everyone wants to play in the big leagues and it’s great to be here,” Tidwell said. “It’s a little extra special because Tony was my manager in college.”

Tidwell allowed seven runs over 6 2/3 innings (9.45 ERA) with 13 strikeouts to six walks during spring training and was part of the first wave of significant cuts. He made his season debut with Triple-A Sacramento on Sunday, pitching 2 2/3 scoreless innings with three strikeouts to one walk.

Vitello said that Tidwell could pitch in a swingman role, but added he could use Tidwell in other roles, including high-leverage situations.

“Blade, right now, is probably best suited to come in and get three outs for us, but I don’t think it’s past his conditioning to go out there, at the very least, up and down twice,” Vitello said.

Vitello sets tentative date for Devers’ return to first base

Rafael Devers has been limited to designated hitter as he manages lingering hamstring tightness, but Vitello said Devers could make his return to first base by the Giants’ next homestand “at the very least.”

The Giants’ next homestand begins on April 21 against the Dodgers, but Devers could make his season debut at first base before that meeting with Los Angeles.

With Devers still at designated hitter, Vitello started Casey Schmitt at first base over Jerar Encarnacion, who has only had one at-bat this season. On Wednesday, Schmitt failed to haul in a pair of throws from third baseman Matt Chapman. Chapman, in a moment of frustration, told Schmitt to “catch the (expletive) ball” during a fifth-inning mound visit, but both sides said they hashed things out.

When Vitello was asked if starting Schmitt at first was a vote of confidence after Wednesday’s misplays, Vitello responded that there’s “no agenda with the lineup other than trying to win the game.”

Schmitt was originally assigned an error after failing to catch Chapman’s throw in the first inning of Wednesday’s game, but it was announced on Thursday morning that the error had been re-assessed to Chapman. That scoring change gave Chapman two errors from Wednesday’s game.