Pirates to spend $11 million to expand retail store, upgrade concession stands at PNC Park
O's New Lease Deal Continues Stadium-Centered Development Trend
Pirates announce upgrades coming to PNC Park – WPXI
Pirates plan for $11 million upgrade to PNC Park - Pittsburgh Business Times
MLB free agency: Andrew McCutchen signs with Pirates - Sports Illustrated
MLB offseason tracker: Blue Jays add Chad Green to bullpen MLB - Bally Sports
What Are the Big Upgrades Coming to PNC Park This Season?
Oriole Park at Camden Yards - Wikipedia
O's commit to Oriole Park for 30 more years - Ballpark Digest
Pirates plan for $11 million upgrade to PNC Park - Pittsburgh Business Times
Pirates Considering Legal Action Against SEA Over PNC Park Upgrades - CBS Pittsburgh
PNC Park adding dollar surcharge