The Nittany Lions clinched their first 30-win season since 2011.
The goalie will join Matt Traynor and Kevin Parnham as newcomers to the Premier Lacrosse League.
Hunter Aquino earned the highest recognition among the four Penn Staters who were named.
The Nittany Lions were mercy ruled for the third time this season.
Mau has four years of eligibility remaining.
Merkle withdrew her name from the transfer portal and was previously committed to Maryland.