Dividend aristocrat Abbott Labs (ABT 0.63%) has has a long history of rewarding income investors, but after its transformation, is it still one of the sector's top dividend stocks? 

In this video, Motley Fool health-care analyst David Williamson will be grading well-known dividend stocks using a World Cup-inspired grading system: a yellow card is a warning for investors, a red card is an ejection, and a "goal" happens if the stock looks like a winner. 

Watch and find out the strengths and weaknesses of Abbott Labs, and whether investors should eject it.