Nik Turley, a lefthander who has posted a 2.05 combined ERA for Class AAA Rochester and Class AA Chattanooga, will make his major league debut Sunday, manager Paul Molitor has decided.

Turley, a 27-year-old from La Cañada Flintridge, Calif., has bounced around the minor leagues for a decade after being drafted in the 50th round of the 2008 draft. He was signed as a minor league free agent over the winter. But he has had the season of his life, giving up only one run in 24⅓ innings at Chattanooga, then 11 runs in 28⅓ innings at Rochester. His career stats are here.

“His last start was impressive,” Molitor said of Turley’s six shutout innings on just four hits against Scranton on Tuesday. “He was struggling with his offspeed for a while, but it seems like he’s got that back on track.”

What Molitor didn't mention is that Turley struck out 15 batters in that start and, between Chattanooga and Rochester, has 84 strikeouts in 52 2/3 innings this season.

Here's a look at the 15th.

The Twins must make a move to add Turley to the 40- and 25-man rosters. They will announce those transactions Saturday.