January 6, 2010, sending him to free agency. On January 30, 2010, Karl was signed to a 10-day contract by the Golden State Warriors. After his stint with the Warriors, he returned to the NBA D-League as a member of the Idaho Stampede. On April 11, 2010, Karl was signed to the Nuggets to an undisclosed contract. He was waived by the Nuggets on August 16, 2010. In September 2010, he returned to play in Spain, signing a one-year contract with CB Granada. In May 2011, after being relegated to the second division in Spain with CB Granada, he signed with Armani Jeans Milano in Italy until the end of the season. In September 2011, he signed with Fabi Shoes Montegranaro in Lega Basket Serie A in Italy. In October 2012, Karl rejoined the Idaho Stampede. On July 30, 2013, Karl signed with Pallacanestro Reggiana of Italy. He left them in December 2013. He then signed with MHP Riesen Ludwigsburg. On March 12, he left Riesen Ludwigsburg with the intent of going to the D-League. On March 17, 2015, he signed with Reno and made his debut. On August 21, 2015, Karl retired. Coaching career On October 27, 2015, Karl was hired as an assistant coach by the Westchester Knicks, the NBA Development League affiliate of the New York Knicks. Westchester made significant improvement during the one season Karl spent on the bench, upping its record from 10-40 in 2014-15 to a 28-22 mark during the 2015-16 campaign. On September 12, 2016, Karl took over his first head coaching role with the NBA D-League's Los Angeles D-Fenders, the affiliate team of the Lakers. He was not retained by the organization prior to the 2021–22 season. On September 28, 2021, Karl became the new head coach of the Delaware Blue Coats. Thyroid cancer Karl also underwent radioactive iodine treatment, a painless and simple outpatient treatment, for papillary carcinoma, a thyroid cancer considered by doctors to be one of the most treatable forms of cancer. After his senior year, Karl again had another surgery to remove cancerous cells. His father left the Nuggets to be with his son during the seven-hour surgery and returned to the team after the completion of the surgery. NBA career statistics Regular season |- | align="left" | | align="left" | L.A. Lakers | 17 || 0 || 4.2 || .346 || .308 || .800 || .8 ||