Lausa made his professional debut in Asia's first professional MMA promotion,
URCC, in 2011 as a flyweight. In 2013, he signed with Pacific Xtreme Combat (PXC). He compiled a record of 5 wins and 1 loss and a flyweight championship, with 4 straight wins before signing with the
UFC.
Ultimate Fighting Championship Lausa was scheduled to make his promotional debut on October 15, 2016 against
Yao Zhikui at
UFC Fight Night 97. However, due to the cancellation of the event, Lausa's match with Yao was moved to a later event at
UFC Fight Night 101 on November 27, 2016. Lausa won the fight by unanimous decision. Lausa faced promotional newcomer
Magomed Bibulatov on April 8, 2017 at
UFC 210. He lost the fight via unanimous decision. Lausa was expected to face
Naoki Inoue on September 23, 2017 at
UFC Fight Night 117. However, Inoue pulled out on September 9 due to a dislocated shoulder. As a result, Lausa was removed from the card and is expected to be rescheduled against a new opponent at a future event. Lausa faced
Eric Shelton on November 19, 2017 at
UFC Fight Night: Werdum vs. Tybura. He lost the fight by unanimous decision. Lausa was scheduled to face
Ashkan Mokhtarian on June 13, 2018 at
UFC Fight Night 132. However, it was reported on May 2, 2018 that Mokhtarian pulled from the fight citing injury and he is replaced by
Ulka Sasaki. Lausa lost the fight in round two via a rear-naked choke submission. He was released by the UFC on June 24, 2018.
BRAVE CF Lausa returned to MMA after taking two years to focus on boxing to face Ryskulbek Ibraimov at
BRAVE CF 47 on March 11, 2021. He lost the fight via unanimous decision. Lausa next appeared at UAE Warriors 28 against Abdula Aliev on March 26, 2022. He lost the bout via technical decision after being unable to continue in the third round due to a groin strike. Lausa faced Dansheel Moodley on November 26, 2022 at
BRAVE CF 66, losing the bout via unanimous decision. ==Championships and accomplishments==