A mini-Santana reunion took place last night (Aug. 28) when Carlos Santana and Gregg Rolie sat in with Journey. The concert took place at the Pearl Theater at the Palms Hotel and Casino in Las Vegas.

Rolie was the founding keyboardist and singer in Santana, appearing on their 1969 debut album, providing lead vocals to the classics 'Black Magic Woman' and 'Evil Ways.' Two years later, Neal Schon joined the group, with both of them departing after 1972's 'Caravanserai' to form the group that would eventually become Journey.

Back in February, we learned that Santana and Schon were looking to reunite the original Santana lineup, although Rolie's involvement was not definite. "It will be like 'Santana IV' because we stopped at 'Santana III,'" Santana said of the project, which is expected to be out in 2014.

Santana is still in the midst of the two-year residency at the House of Blues at the Mandalay Bay Hotel and Casino in Vegas that he began in 2012. The next series of shows in his 'An Intimate Evening with Santana: Greatest Hits Live – Yesterday, Today & Tomorrow,' program begins Sept. 11 and will run through Nov. 17.