Phoenix Mercury's Satou Sabally has one of the hottest trading cards. Photo: Sam Hodde/Getty Images
WNBA trading card collecting is gaining popularity and Phoenix Mercury forward Satou Sabally has one of the most valuable cards, according to data from Professional Sports Authenticators (PSA).
Why it matters: The sports card grader reports that the number of women's basketball cards graded has tripled since this time last year.
Zoom in: Sabally has the sixth-most appraised card on PSA among players competing in the WNBA playoffs.
What we're watching: The Mercury are 1-1 in the first round of the playoffs after blowing out the New York Liberty last night. The tiebreaker is scheduled for Friday at PHX Arena.
