Timothy James Welke (born August 23, 1957) is a former American professional baseball umpire. He worked in the American League from 1984 to 1999 and has worked throughout Major League Baseball from 2000 to 2015. He had been a crew chief since 2000. Welke wore number 30 when he joined the American League staff, then switched to 3 after the AL and National League umpiring staffs merged in 2000. His brother Bill is also a major league umpire. Tim has umpired in four World Series, seven League Championship Series, eight Division Series and three All-Star Games.