R.J.
According to the National Cancer Institute and studies done by them and others over the past several decades; no. ((technically, science rarely uses the words no or yes. No = weak, Yes = strong... because nothing is true in every case. For example the link between smoking and lung cancer is strong... because smoking doesn't cause lung cancer in all cases. So whenever a study shows a link is "weak" take that to mean no, or "strong" take that to mean "yes")).
HOWEVER studies are ongoing looking at how vasectomies make EXISTING testicular cancer develop faster or slower... those results aren't out yet, but research in stage is suggesting no link.
Here's a quick link on a summary of the most relavent studies over the past couple decades and their findings.
http://www.cancer.gov/cancertopics/factsheet/Risk/vasectomy