In sports, if things aren't going well for a team, the first one shown the door is usually the head coach. It works much the same in business, as Dendreon (Nasdaq: DNDN) and Savient Pharmaceuticals (Nasdaq: SVNT) investors were reminded today.

When it was announced that well-regarded CEO John Johnson was jumping ship from Savient, the small cap saw its shares plummet by 10%, while Dendreon, Johnson's new home, moved upward nearly 5%. Savient couldn't have been caught totally off guard: Johnson has served on Dendreon's board for about half a year, allowing the other members to kick his managerial tires.

Blame a bungled less-than-ideal rollout of prostate cancer vaccine Provenge, featuring unrealistic sales expectations, a rapid build-out of excess manufacturing capacity, pulled guidance, mass layoffs, all of which culminated in one of the worst stock performances of 2011. It has gotten to the point where management's "modest" sales-growth target last quarter was better than feared (but still a sequential decline, mind you) and shares popped 50%!

Can a new CEO right the ship? Possibly. Despite Dendreon's official line about strengthening commercial efforts this situation is not exactly a mirror of Vertex Pharmaceuticals (Nasdaq: VRTX). Vertex's CEO Matthew Emmens left today after a tremendous run that saw Hep-C drug Incivek become an instant blockbuster and a second drug, Kalydeco, get approved the day before he stepped away from the helm so that a successor could grow the company.

Two things stand out for me about John Johnson's switch. He was Savient's CEO for little more than a year as the stock fared worse than Dendreon's in 2011. Savient was looking for a takeout partner before he arrived, but struggled when having to bring gout drug Krystexxa to market on its own, something Johnson was supposed to help with. To have a CEO abandon ship after such a short and trying time must be disconcerting for Savient investors and his lack of success at Savient may be a red flag for Dendreon investors. However, Johnson, when running ImClone, successfully parlayed  top drug Erbitux into a $6.5 billion buyout by Eli Lilly (NYSE: LLY). A Big Pharma takeover could potentially be back on the table for Dendreon.

And while a 5% move may not be much, without the CEO announcement, Dendreon shares would have likely been down today. Its newest potential rival, Medivation's (Nasdaq: MDVN) MDV3100, presented additional data at a cancer symposium and it impressed, especially with how well it was tolerated by patients. Right now it is used after patients have failed other treatments, but with such stellar efficacy and safety profiles, there is a strong likelihood this drug could move up to Dendreon as a front-line treatment. Dendreon's current management think that the two treatments will be used in combination and that they won't eat into each other's sales.

Much like the new direction of Dendreon, a lot remains to be seen.

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