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Joe Gibbs
Stewart's split decision

CONCORD. N.C. — Breakups are always complicated. You rarely leave on equal terms. It seems one party initiates the split. Irreconcilable differences, anyone? That's how it went down with Tony Stewart and Darian Grubb last season. Stewart told Grubb, his crew chief of three years, just before the start of the Sprint Cup 10-race Chase playoff format that he would have a new crew chief in 2012. But then unexpectedly, something clicked between them, and Stewart won five of the 10 races to capture his third Sprint Cup title. Oops. Was there a chance at a reconciliation? Not really. Stewart remained firm in his decision, leaving Grubb a little perplexed. It was quite the shock to the...