A fresh arm is joining the Toronto Blue Jays ahead of Thursday’s double-header versus the Chicago White Sox.

Jay Jackson has been recalled from triple-A Buffalo to serve as Toronto’s 27th player for both games at Guaranteed Rate Field, the club announced prior to first pitch on Thursday.

The 35-year-old, who re-signed with the Blue Jays last March after requesting his release from a minor-league contract, has made four appearances with the big-league club this season, posting a 1.59 ERA and 4.53 FIP with six strikeouts across 5.2 innings.

Jackson’s most recent outing with Toronto occurred on June 5 versus the Houston Astros, when he allowed just two hits over 2.2 scoreless innings while punching out four in relief of Alek Manoah, who’s returning to the majors on Friday in Detroit.

The veteran righty has logged 24.2 innings in 21 appearances with the Bisons, posting a 6.57 ERA, 5.04 FIP and a 24.8 per cent strikeout-to-walk rate difference. He has also converted a pair of saves for the franchise’s triple-A affiliate.

If optioned back to triple-A following Thursday’s double-header, it will not count against Jackson’s total for the season, meaning he can still be sent to the minors two additional times before requiring waivers.