"We're just going to keep an eye on it," Rosario said through an interpreter.
Initially, Rosario said, he injured the finger taking a swing in Game 2 of Saturday's doubleheader at Minute Maid Park. He played through the discomfort and was back in the lineup on Sunday, but during the game, the finger began swelling, prompting him to say something to manager Terry Collins.
Rosario underwent X-rays, which were negative, and hopes to play this week. But the Mets will be cautious with one of the most important pieces of their 2018 roster.
In 31 big league games, Rosario is hitting .245 with four home runs, three triples, two doubles and four stolen bases. The second-ranked prospect in all of baseball, according to MLBPipeline.com, Rosario is in line to enter Spring Training as the starting shortstop.
The organization hopes that both Rosario and Dominic Smith can form the core of its next winning team. After a slow start to his own big league career, Smith thrived over three games in Houston, going 5-for-13 with a home run, two doubles and four RBIs. Overall, Smith is batting .200 with four homers in 23 games.
"I'm learning every day," Smith said. "It's a tough game. And every day you step on the field, you don't get a break. You're playing against the best players in the world."
Anthony DiComo has covered the Mets for MLB.com since 2008. Follow him on Twitter @AnthonyDiComo and Facebook. This story was not subject to the approval of Major League Baseball or its clubs.