The designated hitter, a role that fans will see in both leagues for the first time in 2020 (and possibly in all future seasons), has evoked fierce debates on its merits ever since it was introduced to big league baseball nearly five decades ago. But why do people have such strong feelings about the DH, and how did it come to be in the first place?

Those are the questions tackled in the latest installment of MLB’s "Quick Question" YouTube series. Featuring interviews with MLB historian John Thorn, Cy Young Award winners Blake Snell, Clayton Kershaw and (noted home run hitter) Bartolo Colon and one of the best sluggers to ever man the DH position, Frank Thomas, this episode dives into the concept of the DH, the various passionate arguments for and against its spread to the National League and the wacky story of how one fishing trip kept the DH from being universal long ago.

So, if you’ve ever wondered what a DH is -- and why the baseball fans in your life argue so loudly about it -- this video is for you.