Originally written on Phillies Nation  |  Last updated 11/15/14
Jonathan Pettibone has been a revelation for the Phils. But how long can it continue? (AP Photo). As I wrote in my recap on Tuesday night, Jonathan Pettibone deserves a lot of credit.  He has started five games so far this year and the Phillies have won four.  He has shown a veteran’s ability to battle through jams.  He has displayed a pretty good fastball, which at least through his first three starts, he routinely threw for strikes and forced opposing batters to put the ball in play.  But before we all get carried away, it’s important to note that Pettibone is not the first marginal Phillies pitching prospect in recent years to enjoy immediate success upon his big league promotion. Consider the statistics for the following Phillies starters, past and present, compared to Pettibone through five starts: Jonathan Pettibone:  3-0, 3.41 ERA, 1.28 WHIP, 5.3 K/9 in 29 IP Vance Worley:         2-2, 2.09 ERA, 1.11 WHIP, 7.7 K/9 in 27 IP J.A. Happ:                1-1, 3.57 ERA, 1.30 WHIP
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