Tim Cowlishaw, sports columnist for SportsDayDFW.com and The Dallas Morning News, author of Drunk on Sports and panelist on ESPN's "Around the Horn," answered your questions about the Cowboys, Rangers, Mavericks, Stars and college sports in his reader mailbag. Here are some highlights:Question: Did the Cubs overpay for Yu Darvish?Tim Cowlishaw: To invent, a word, I would say they over-yeared more than they overpaid.