He worked his way to the starting lineup, averaging 19 points, with a 96% free-throw percentage, shooting 49% from the field and 44% from 3-point range in 41 games.

On March 21, 2008, Ahearn was signed to a 10-day contract by the NBA's Miami Heat, whose roster had been depleted by injuries.

[5] On April 10, Ahearn was named the Rookie of the Year of the D-League and All-NBA Development League Second Team.

[6] Despite posting a solid NBA preseason during which he averaged 8 points per game, Ahearn was cut by the Minnesota Timberwolves on October 23, 2008.

On November 16, Ahearn was signed by the San Antonio Spurs becoming the 2008–09 season's first D-League call-up.

He was selected to play in the D-League All-Star Game on February 14, 2009, where he was awarded MVP alongside Courtney Sims.

[8] The following season Ahearn signed a contract with Estudiantes Madrid in Spain, until he moved back and played for the Bakersfield Jam and for the Erie BayHawks in the NBA Development League.

On August 1, Ahearn signed a contract with the Italian team Teramo Basket but he was waived after a few games.

Blake started the 2011–12 season participating for the United States Basketball Team in the 2011 Pan American Games.

[10] Blake attended training camp with the Los Angeles Clippers during the first part of the D-League season.

[13] Blake set the all-time career points record for the NBA Development league in 2012.

[23] On August 1, 2017, Ahearn was named the head coach of the Austin Spurs of the NBA G League.