The Giants, Phillies and Red Sox are among the clubs interested in free-agent reliever Tony Watson, a source told MLB Network insider Jon Heyman on Tuesday.
USA Today's Bob Nightengale was the first to report that the Giants and Watson were in "serious contract talks."
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None of the clubs have confirmed their interest in the left-hander, who went 7-4 with a 3.38 ERA in 66 2/3 innings split between the Pirates and Dodgers in 2017.
Watson was an integral part of the Dodgers' bullpen in the postseason as well, appearing in 11 games while allowing two earned runs on five hits in seven innings. He was the winning pitcher in both Game 4 and Game 6 of the World Series.
The 32-year-old is 33-17 with a 2.68 ERA in 453 career innings. He was an All-Star with Pittsburgh in 2014, when he went 10-2 with a 1.63 ERA in a career-high 78 appearances.
It's unclear at the moment which other clubs might be attempting to bring on Watson, but the A's are one team that has been linked to him.