PHILADELPHIA -- One of the most valuable, but perhaps most underrated relief pitchers in baseball this season is Seranthony Domínguez.

It is why everybody is closely watching his recovery from right triceps tendinitis.

“I feel better, way better,” Domínguez said Saturday afternoon at Citizens Bank Park. “Now I’m able to move my arm. It feels good.”

Domínguez could begin throwing Sunday or Monday. He is eligible to be activated as early as Friday in San Francisco. Domínguez said he has “no idea” if he will be back Friday, but he said he feels like it will not be much longer than that.

“I feel like I’ll be back soon,” he said.

It would be welcome news, if true. Domínguez is 6-4 with a 1.64 ERA in 44 innings this season. His 1.4 WAR is 12th out of 165 qualified relief pitchers in baseball, according to FanGraphs. But because Domínguez has only nine saves, he seems to fall through the cracks when the game’s best relievers are discussed.

Domínguez said he is not sure why he felt tightness and swelling in his right elbow after playing catch before the Aug. 20 doubleheader against the Mets, which prompted his trip to the 15-day IL on Aug. 21. But he said the fact he has thrown 44 innings this season, compared to a combined 46 in the Major and Minor Leagues from 2019-21 because of a right elbow injury that required Tommy John surgery, probably has something to do with it.

“I’ve been out for a long time,” he said. “Maybe stress on my arm. It started to feel a little tight. But it happened early in the season, too. It felt tight then it went away. I felt better. I was pitching good. Last week in Cincinnati it started to feel tight again. I felt like I lost mobility. That’s why it was tough to throw. But with treatment and medicine, I think I’ll be ready.”