Werenka was drafted 37th overall by the
New York Rangers in the
1991 NHL Entry Draft, but never played in the NHL, instead spending three seasons in the
American Hockey League with the
Binghamton Rangers. After playing for different
IHL teams in two seasons, Werenka moved to Europe and joined Austrian side
Vienna Capitals in 1997, spending two seasons with them. After a season back in the IHL with the
Utah Grizzlies, Werenka returned to Europe and played in
Finland's
SM-liiga, splitting the year with
Jokerit and
HPK. He then played two seasons in the
Deutsche Eishockey Liga, playing for the
SERC Wild Wings and the
Kölner Haie. In 2003, he returned to Vienna and helped guide the team to their first ever Austrian ice hockey championship in 2005. At the latter stages of his career, he moved on from the EBEL in 2011, to enjoy a single season in the
French Ligue Magnus with
Rouen HE 76. ==International play==