According to the web site for the prize, Adam W. Marcus, Daniel A. Spielman and Nikhil Srivastava will receive the Pólya Prize 2014.
The George Pólya Prize, established in 1969, is given every two
years, alternately in two categories: (1) for a notable application of
combinatorial theory; (2) for a notable contribution in another area of
interest to George Pólya such as approximation theory, complex analysis,
number theory, orthogonal polynomials, probability theory, or mathematical
discovery and learning.
There does not seem to be a press release on the SIAM web site, but this should not prevent us from congratulating Adam, Dan and Nikhil for receiving this award. Congrats!