Leiter was claimed off waivers by Toronto on Saturday.
The 27-year-old has a 5.03 ERA in 107.1 career major-league innings, though his underlying numbers are respectable. His 8.1 percent career walk rate is roughly average, while his 20.3 percent strikeout rate is slightly below average and his 49.1 percent groundball rate is above average, suggesting that he could at least be a competent swingman.