Bronson Arroyo is expected to miss 7-10 days after receiving an epidural injection for an inflamed disk in his back.

The veteran right-hander signed a two-year, $23.5 million deal with the Arizona Diamondbacks last month.

Arroyo was scratched from his start Tuesday after feeling discomfort while running during warmups.

"(The doctors) just want it to calm down before he starts throwing again," Kevin Towers said. "Of course, Arroyo doesn't think it'll take that long.

"We'll just have to play it by ear to see how he's feeling."