There is one TFS option that is built-in, but it's not necessarily the best solution.
- TFS 2010 Tutorial A tutorial for one approach to integrating StatLight with TFS 2010 using the TRX output option.
- Take a look at using the --ReportOutputFileType=MSGenericTest flag in conjunction with the -r:<path> (you can read more detail here
- Consider using the --ReportOutputFileType=TRX (I'm assuming TFS works with this standard MSTest format)
Other options are hacky work arounds - but could work for you.