According to Elias

 

Trevor May
Trevor May

Trevor May walked seven batters without recording a strikeout in his major-league debut, a 9-4 Twins loss at Oakland last night. No pitcher had issued that many bases on balls without a strikeout in his first big-league game since the White Sox Ken Kravec (7 walks) on September 4, 1975 versus the Royals. And the only other pitcher in Twins franchise history with such an inauspicious debut was the Washington Senators’ Joe Krakauskas, against the Philadelphia Athletics on September 9, 1937 (7 BB).

No major-league pitcher had issued 7+ walks without a strikeout in any game since the Blue Jays’ Ricky Romero (8 BB at Detroit) on August 21, 2012. And the last Twins pitcher to put up a line like this was Willie Banks (7 BB at Boston) on July 25, 1992.