Through changes in personnel and management, good seasons and not-so-good, Plekanec remained a constant for the Montreal Canadiens for more than a decade.
After playing two games for the Canadiens in 2003-04, Plekanec cracked the Montreal lineup for good as a 22-year-old in 2005. But he would have to wait his turn to wear No. 14, the number he owned throughout his career in the Czech Republic; veteran Radek Bonk was wearing the number at the time, so Plekanec took No. 35.