#4 Alan Shearer
Alan Shearer is a Newcastle United legend and without a hint of doubt, one of the most prolific goal scorers in English football. The 45-year-old former England international has played 303 matches for the Toons finding the back of the net on 148 instances.
However, Shearer has had a very mediocre stint at the managerial level of the game.
Back in 2009, he was appointed by Newcastle United in the latter part of the season as a caretaker manager. The former England forward had nine matches to save the Magpies from the relegation zone. However, under Alan Shearer, the Tyneside club could only manage to secure a mere five points out of a possible 27 and after 16 long years slumped to the second division of English football.