Matthews was Penn State football's first commit for the class of 2025 before reopening his recruitment in September.
Barraclough held a 15-13 record as a Nittany Lion.
The university placed in the top 8% of the more than 1,500 institutions graded.
The Nittany Lions added six new forwards, three defensemen, and two goalies in the latest round of player signings.
Dixson announced his commitment a day after his official visit to Penn State.
K2 Roots & Vitality Wellness Club expects to open at its new location within a month.