Jason Grilli aiming to rejoin Pirates in September

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Jason Grilli’s feel-good season took an unfortunate turn last month when he was diagnosed with a strained flexor muscle in his right forearm, but he’s hoping that the story has a happy ending.

James Santelli of Pirates Prospects was told by Pirates manager Clint Hurdle that Grilli is making “good progress” and will throw from a distance of 90-100 feet today and 120 feet when the team gets to San Diego. Michael Sanserino of the Pittsburgh Post-Gazette adds that he could begin throwing from a slope or possibly the mound early next week. If all goes well, he could rejoin the Pirates around when rosters expand on September 1.

Grilli has enjoyed a renaissance late in his career, posting a 2.34 ERA, 30 saves and a 66/10 K/BB ratio over 42 1/3 innings this season. The 36-year-old was named to the National League All-Star team last month. While he has been missed in the Pirates’ bullpen, Mark Melancon has filled in nicely as the closer by going 5-for-6 in save opportunities.