#5 Alan Shearer

In the Premier League and for Newcastle United, there are few players more legendary than Alan Shearer. The striker still holds the record for all-time Premier League goals scored, and is usually rated as the best striker in league history. As a manager though, he could hardly have done much worse.
After his retirement in 2006 there were plenty of rumours that suggested Shearer was heading into management, but none of them proved true until April 2009. Newcastle’s manager Joe Kinnear had taken ill due to heart issues, and Shearer was surprisingly pegged as his replacement, taking charge for the final eight games of the season and tasked with saving Newcastle from possible relegation.
Unfortunately for Magpies fans, not only did Shearer fail to save them, but he failed miserably. His first match started badly – a 2-0 loss to Chelsea – and despite a 3-1 win over local rivals Middlesbrough, it didn’t really get much better. On the final day of the season Newcastle were defeated 1-0 by Aston Villa, and suffered a painful relegation to the Championship.
All in all, Shearer’s run as Magpies boss yielded just five points from a possible 24, one of the worst runs in Newcastle and Premier League history. With the 2008/09 season over and done with, it came as no surprise to anyone when Shearer was not given the job permanently and returned to his television work. He’s not ventured into management since.