Major League Baseball is considering two of its biggest rivalries for the 2020

series in London.Per Ronald Blum of the Associated Press Enos Slaughter Jersey , a series between the New York Mets and Washington Nationals or Chicago Cubs and St. Louis Cardinals are being considered.MLB announced a two-year commitment to play one series of regular-season games at London Stadium in 2019 and 2020.This year's series will feature the Boston Red Sox and New York Yankees playing two games on June 29 and 30."We've been looking for the right opportunity to come to Europe," MLB Commissioner Rob Manfredsaidduring last year's announcement. "We think that London is the perfect place, and we're excited about bringing over one of the great rivalries in the Red Sox and Yankees."The Cubs-Cardinals rivalry is one of the oldest in MLB history. Chicagoleadsthe all-time series 1,230-1 http://www.stlouiscardinalsteamshop.com/authentic-marcell-ozuna-jersey ,171-19.The Mets and Nationals don't have a rivalry as intense or storied as the Cubs and Cardinals, but both teams feature a wealth of talent to showcase. Washington's Max Scherzer and New York's Jacob deGrom have combined to win the last three NL Cy Young Awards.An official announcement from MLB regarding the 2020 London Series is expected to come after Opening Day on March 28. The New York Mets are expected to retain manager Mickey Callaway despite the team sitting at 45-64 after Sunday's loss to the Atlanta Braves.Steven Marcus of Newsday reported the news.Callaway, 43, is in his first season with the Mets after being hired last October. The Mets opened the year 11-1 but are 34-63 since Kolten Wong Jersey , leading to some speculation that Callaway could be on the outs."Obviously everybody, as a person you think about what could happen, you know, reality of the situations Trevor Rosenthal Jersey ," Callaway told reporters this weekend. "But I always try to just go out there and approach the game and the job every day like this is going to be my job forever and try not to worry about the repercussions of us not winning games and things like that as far as it pertains to me. I'm just worried about the players, the work, do the best we can."Callaway was hired by Sandy Alderson, who took a leave of absence in June to receive treatment for cancer. The Mets are expected to hire a replacement this winter http://www.stlouiscardinalsteamshop.com/authentic-marcell-ozuna-jersey , which Marcus reported could be an outside candidate.Callaway's job is viewed as safe regardless of who the Mets hire as Alderson's replacement.The Mets' payroll, which is the 12th-highest in baseball, features more than $80 million worth of players currently on the disabled list. That is by far the highest number in the sport, nearly $18 million more than the San Francisco Giants.Yoenis Cespedes and David Wright account for $49 million of that total.