Question: What two positions were played by the MLS player who went into retirement after winning his 6th MLS crown at the MLS Cup 2014?
Sentence (from "MLS Cup 2014"): The Galaxy won 2–1 after Overtime, winning their fifth MLS Cup title and also sending all-time U.S. national team goal scoring leader Landon Donovan into retirement with his sixth MLS Cup crown.
Relevant evidence: Yes