The 6 feet 5 inches (1.96 m), 220 pounds (100 kg) left-hander was the Twins' third-round pick in the 2006 Major League Baseball draft.

He made his major league debut on June 26, 2012, where Robertson struck out the first three batters he faced.

[1] In the first half of the 2008 season, Tyler went 4–2 with a 2.76 earned run average and 58 strike outs over 11 starts to help Fort Myers capture the Florida State League first-half West Division title.

He was pulled after four innings against the Vero Beach Devil Rays on July 7[year missing] with shoulder soreness, and did not pitch again for the rest of the season.

The slider is actually his most commonly thrown pitch against left-handed hitters, especially when he is ahead in the count.