There were reports of severe weather in the fourth inning and authorities started to direct the fans into the tunnels beneath the stadium.
Hail began to fall as the fans made their way out of the stands and the grounds crew put the tarp on the field.
More from Richard Durrett of ESPNDallas.com:
Fans went out of the stadium through the visiting and home dugouts, out through the large gates in left field and right center field and through the concourses. Rangers officials called it a precaution as heavy rain and hail has already fallen at the park.
Reports say the stadium has seen baseball-sized hail. Tornado sirens were going off in and around the Dallas area.
Fans started to head back to their seats 15 minutes after the hailstorm. The game resumed at 11:20 p.m. CT. Scroll down to watch the video.
WATCH: (Video via WFAA.com)