Let's look at Joel's numbers over his career:
Majors: 29 IP 36 H 19 ER 5 HR 20 BB 23 K (5.90 ERA, 1.93 WHIP) Terrible
Minors: 983.1 IP 938 H 530 R 457 ER 102 HR 464 BB 858 SO (4.18 ERA, 1.43) Mediocre
This was not a fluke performance from Joel, he has a history of walking batters. That is exactly why he never panned out with the Dodgers who drafted him in the 2nd round of the 2000 draft.