Rondon gave up two earned runs on four hits and a walk with three strikeouts in two innings of exhibition work against Cincinnati on Saturday.
In 14.3 innings of work last year for Baltimore and Colorado, Rondon gave up 28 hits and nine walks, leading to a 13.19 ERA and 2.58 WHIP. At 28 years old, he still has time to show that he can compete at the major league level; however, he will have to prove himself at Triple-A Indianapolis in the meantime before a permanent role in the big leagues becomes a reality.