HOUSTON -- Stephen Strasburg threw a simulated game on Monday afternoon in Viera, Fla., and manager Davey Johnson was pleased with what he heard about the performance. "I hear he threw outstanding," Johnson said. "He threw 95 [mph]. "I know he's holding back," Johnson added with a smile. "I know he's chomping at the bit to get back [here]." Strasburg, who turns 23 on Wednesday, underwent Tommy John surgery last Sept. 3 after going 5-3 with a 2.91 ERA as a rookie.