Maryland tested 105 student-athletes in its original screening.
Infielder Taylor Okada went 4-for-5 with three RBI.
The Tigers handed the Terps their worst loss of the season, a 21-2 drubbing.
They'll have a chance to redeem themselves in the ACC/Big Ten Challenge this weekend.
The Terps forced 29 turnovers in Friday's matchup.
Jones, from Olney, transferred from Ohio State. Smith, from Baltimore, is a graduate transfer out of Clemson.
For the third straight year, the Terps will face South Carolina.
Smith will join as a redshirt junior with two years of eligibility remaining.