Stephen Strasburg, who has added a slider to go with his curveball, threw the pitch three times in a spring start against the Atlanta Braves on Tuesday.

The right-hander pitched two scoreless innings in his spring debut.

"I want it to look like a fastball as much as possible," Strasburg said. "I'm not going to dump my other off-speed stuff, but I don't want them to be able to cheat on the fastball as much."