Jared Bernhardt and Nick Grill were named the conference's offensive and defensive player of the year, respectively.
Lizzie Colson, Hannah Leubecker and Grace Griffin each made the all-conference first team.
Over two years removed from tearing her ACL and meniscus in practice, Watson thrived with the Terps this past season.
The high-flying kick returner was also named Big Ten Return Specialist of the Year earlier this week.
Poarch led the Terps with eight goals during the regular season.
Cowan was one of three unanimous selections to the team.
Caroline Steele, Julia Braig and Jen Giles were unanimous selections.