The 170-pound fight adds to the growing fight card, which will take place at American Airlines Center on March 15.
Spencer (11-2) is a winner of two in a row in the UFC. Most recently he fought Drew Dober to a unanimous decision at The Ultimate Fighter 18 Finale last month.
Garcia (11-1) has just one UFC fight under his belt, but made an impact in the bout with a knockout of Ben Wall at the recent UFC Fight Night 33 card in Australia. Overall, he has won five fights in a row.
(Follow @Erik_Fontanez / Photo by Allan Allport)