By Ryan McGowan
I’ve been thinking of metaphors over the last few days, searching for an elusive analogy of universal experience so I could begin to understand the complex four-team deal at the trade deadline that sent long-time Red Sox shortstop, five-time All-Star, two-time batting champion, and franchise icon Nomar Garciaparra to the Chicago Cubs, in exchange for Orlando Cabrera, Doug Mientkiewicz, and Dave Roberts.