Mengden is 2-1 with a 2.21 ERA, 0.93 WHIP and .189 BAA over four starts with Triple-A Nashville.
The 24-year-old right-hander has been particularly effective in his last two starts, allowing just one earned run on seven hits over 13 innings while also compiling 12 strikeouts. Mengden is projected to remain with the Sounds for the moment, although if Jesse Hahn (triceps) and Kendall Graveman (shoulder) both land on the disabled list as expected, he could be in line for a call-up.