Manager Dave Martinez said Strasburg will undergo an MRI after exiting Tuesday's start in Atlanta with right trapezius tightness, Mark Zuckerman of MASNSports.com reports.
The right-hander showed decreased velocity and struggled with his command -- he threw only 14 of 30 pitches for strikes -- before being removed during the second inning of Tuesday's contest. It's yet another injury for Strasburg, who's already spent a month-plus on the injured list this season with shoulder inflammation. He gave up one run on one hit and two walks over 1.1 innings before departing.