The Rockets have already interviewed four candidates for their head-coaching vacancy this week: J.B Bickerstaff, Chris Finch, Sam Cassell and Mike D'Antoni. Bickerstaff, who took over for Kevin McHale on an interim basis 11 games into the season, withdrew his name from consideration Wednesday.
Hornacek, who played for three NBA teams in a 15-year career, had coached the past three seasons with the Suns before getting fired after 49 games. He compiled a 101-112 record with the Suns.
Silas, the son of former NBA coach Paul Silas, has been an assistant coach with Charlotte since 2010. He has also been an assistant coach with Golden State, Washington, Cleveland and New Orleans.
During the 2011-12 season, Stephen Silas was the acting head coach for seven games for the then-Charlotte Bobcats.