05/15/2015 10:52 EDT | Updated 05/15/2016 05:59 EDT

Game of Thrones actor "The Mountain" takes batting practice with Phillies

PHILADELPHIA - The Mountain had an easier time hoisting the Phillie Phanatic in the air than he did swinging a bat for the first time in his life.

"Game of Thrones" actor Hafthor Julius Bjornsson took batting practice before the Philadelphia Phillies played Arizona on Friday night. He barely made contact on a few pitches and then took some soft tosses.

Wearing a No. 13 Phillies jersey with "Thor" written across the back, Bjornsson warmed up with the team after taking his left-handed hacks. He posed for pictures, signed autographs and then the Icelandic strongman playfully lifted the team's furry, green mascot a few feet off the ground.

"When you don't hit the ball, you can't get frustrated. You have to keep trying," Bjornsson said.

Known for playing the character Gregor "The Mountain" Clegane on HBO's hit show, Bjornsson had a day of firsts. He was in Philadelphia for the first time, went to his first baseball game and ate his first cheesesteak.

"I love to try new things. It's a lot of fun," he said.

Bjornsson wouldn't reveal whether he's returning for the fifth season, which is currently airing.

"People have to wait and see," he said.