Grimes joins the professional women's volleyball league after being cut by the San Diego Mojo.
Penn State suffers its first loss of the season in its first road game.
The match was originally set to be played at 4 p.m.
The Nittany Lions move into the top 10 after extending their undefeated start to four with back-to-back wins last weekend.
Coffey joins the English team after spending her first three years of her career in the NWSL.
Both players played crucial roles in leading the Nittany Lions to a 2-0 start.