Batting third and playing right field, Jensen singled in the third inning, smacked a three-run double in the fourth and singled again in the fifth and seventh.
The Marlins' 12th-round pick in the 2009 Draft is 8-for-14 in his last three games, raising his AFL average to .367.
That's a turnaround from the regular season, when Jensen saw his average drop from .299 in 2011 to .234 at Double-A Jacksonville. The 24-year-old he kept up his power numbers, however, belting 24 homers. In August, he went deep in five straight games, a streak that failed to keep him in MLB.com's list of the Marlins' top 20 prospects.
Fellow Miami farmhands Christian Yelich and Jake Realmuto each contributed two hits, with Realmuto driving in two runs. Yordy Cabrera (A's) matched Jensen with three RBIs.
Solar Sox first baseman Jonathan Singleton, Astros' top prospect, belted a solo homer -- his third in nine Fall League games, in the ninth. Rafael Ynoa (Dodgers) collected three RBIs for Mesa, which has lost five in a row.
Brewers right-hander Nick Bucci (1-0) picked up his first AFL win, despite giving up two runs on four hits over three innings. He struck out three and did not walk a batter.
Solar Sox counterpart Luke Putkonen (0-1) gave up three runs on four hits over two frames. The Tigers' prospect walked one and fanned three.