Bartolo Colon exemplifies why the DH rule should be abolished

If legendary MLB pitchers used to pitch entire games with no problems or issues at all, why do current modern day pitchers leave in only the sixth or seventh inning and they

St. Louis Cardinals: The Non-Inclusion of the DH in the National League

Should MLB in the American League change the rule around the DH so that the DH can be used on one position decided before the game instead of being required to be

Before the MLB designated hitter (DH) rule, which batters that were used primarily in the 8th batting slot (the pitcher almost always batted 9th) of the lineup were the most valuable?

Top Sports Stories of 2015: A-Rod's return, Geno Smith gets knocked out, the Mets reach the World Series and more – New York Daily News

Why doesn't the National League have the DH?

The Impossible Has Happened!”: The Magical Story of Bartolo Colon's First and Only Home Run

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The Greatest Pitcher Hitting Moments in Recent MLB History - The Ringer

Bartolo Colon exemplifies why the DH rule should be abolished - NBC Sports

MLB commissioner Rob Manfred cites Bartolo Colon as argument against DH