Howard Kendall was recruited as manager and undertook a complete rebuilding of the side but left in June 1997 to take over at Everton. Player-coach Nigel Spackman was promoted to replace Kendall but after initial promise he quit after only eight months citing boardroom interference. This was to become a recurring theme and replacement Steve Bruce would leave after only one season citing the same reasons. Adrian Heath then proved a disastrous appointment and lasted only six months before being sacked with United looking more likely to be relegated than promoted. The Blades then turned to experienced lower league manager Neil Warnock who managed to stave off relegation and began to rebuild the side on a meagre budget. Warnock proved a divisive figure with fans, but after a number of mid-table finishes he achieved promotion back to the Premiership in 2006. The side were relegated the following season, prompting the board not to renew Warnock's contract. Just like Adrian Heath, the appointment of Bryan Robson in 2007 proved an unpopular and unsuccessful one and he was sacked after less than a year following poor results and intense fan pressure. Former assistant manager Kevin Blackwell was appointed as Robson's replacement but despite reaching the play-off finals in his first full season the team was obviously in decline and he was sacked after only two games of the 2010–11 season. Worse was to come however as player-coach Gary Speed was briefly promoted to manager but left after only a few months to take over the Welsh national side. Micky Adams then became the third full-time manager of the season, and oversaw a disastrous run of results which saw United relegated and Adams sacked after only six months in charge. With United in the third tier once more, Danny Wilson was appointed as manager in June 2011, despite protests from United fans over his previous association with cross-town rivals Sheffield Wednesday. Wilson guided the club to the League One play-off final in his first full season in charge, only to lose to Huddersfield Town after a famous penalty shootout in which Huddersfield missed their first three penalties. Despite the club challenging for promotion the following season, a poor run of results led to Wilson's departure in April 2013, being replaced by Chris Morgan until the end of the season. After a long search for a new boss, former Scotland defender David Weir was