X different Opening Day Starting Designated Hitter in X Seasons (since 1914)
|Angels (11?)||10||2003-12 **|
Baseball-Reference takes us back until 1914 and while Retrosheet provides starting pitchers in their game logs, it doesn't have that for other positions.
The final names on the top two lists are the Young brothers, Dmitri and Delmon. Baltimore's streak is still active, hopefully someone other than Young or Steve Pearce starts at DH this week to extend it to 13.
The 10-year streak by the Angels is unusual and could still be considered active. From 2003-12, they ran out Brad Fullmer, Tim Salmon, Jeff DaVanon, Garret Anderson, Shea Hillenbrand, Gary Matthews, Vladimir Guerrero, Hideki Matsui, Bobby Abreu and Kendrys Morales. With the 2013 realignment that forced year-round interleague play, the Halos opened the season in Cincinnati and did not use a DH. Playing under A.L. rules once again in the 2014 opener, they started Raul Ibanez for an 11th straight different starter. So they had a 10-year streak interrupted by a game at a National League park, but they still picked up where they left off last year. If you want to consider the streak an active one, go right ahead.
Here's the full list of DH's from the teams shown above. Some interesting names here include a not-your-typical-DH Bip Roberts, the delightfully-named John Wockenfuss and the post-1933 player with the highest WAR that never made an All-Star team, Tony Phillips.