The Mavericks will look to replace seniors Nina Villanueva and Meagan Michele.
UTA has one returning pitcher to its squad of four this season in sophomore Brittany May.
UTA welcomes five newcomers from high school and one junior college transfer.
The Mavericks feature three new pitchers and a new pitching coaching this season.
Decker has spent time as an assistant at the Doug Gillis International Fastpitch Institute. In that position he helped in the instruction of pitching staffs at Evansville University and the University of Missouri. He has also instructed players at the Bulls/Sox Training Academy in Lisle, Ill., while also helping current Japanese Professional League pitcher, Michael Bowden, of the Seibu Lions and formerly of the Chicago Cubs and Boston Red Sox, develop pitches and work on his mechanics.
The Aurora, Ill., native was a two-year captain for the Waubonsee Community College baseball team where he was twice named an all-conference and all-region performer while leading Waubonsee to a seventh-place finish at the 2010 NJCAA Division III World Series. He then transferred to Trinity International University, where he was a member of the baseball team, volunteer assistant for the softball team and earned his bachelor's degree in May 2013.