The founder of sporting goods manufacturer Under Armour, Kevin Plank, is returning to the top job after a four year hiatus. The 51-year-old will take over as chief executive officer again on April 1, Under Armour announced on Wednesday. Plank moved to the top of the Board of Directors in autumn 2019. There had previously been negative media reports about the corporate culture at Under Armour. The Wall Street Journal had reported that Plank and other managers had taken athletes and employees to strip clubs. Under Armour, which Plank founded in 1996, has recently been struggling with declining s…