"I didn't see it coming," said Clark, a former Golden Gloves boxer. "The fact of the matter is I was able to get up and continue my work."
Clark wasn't the only member of the team to get struck in batting practice. Catcher Rene Garcia was hit on the top of the head by a ball during batting practice, but he was fine.
"We're going to get it up on the white board so everybody knows where everybody's at," manager Bo Porter joked.
Clark, who wears a helmet while coaching first base, says getting hit by a ball isn't usually something he worries about.
"In the back of your mind you think about a batted ball, but for someone to throw the ball?" he joked. "I'll rag on Nate the rest of the day and the rest of Spring Training."
Brian McTaggart is a reporter for MLB.com and writes an MLBlog, Tag's Lines. Follow @brianmctaggart on Twitter. This story was not subject to the approval of Major League Baseball or its clubs.