Competition motivates baseball players to perform at their best, and it will produce good results for the Washington Nationals at second base.
An excellent example of this theory occurred with the Baltimore Orioles during the 2003 and 2004 seasons. At the time, both Jerry Hairston and Brian Roberts were good enough to start at second base for the Orioles. But both players prevented their manager from making an easy decision.
Finally, an open competition was declared, and it eventually worked out well for all parties involved. The Orioles gained an All-Star second baseman in Brian Roberts, and Jerry Hairston has forged a solid career at various stops throughout the league since then.
The Washington Nationals would benefit greatly by employing this solution. The team would never have a weak link at second base, as both players would be fighting for their jobs.
The winner of the competition would become the team's starting second baseman, and the runner-up would be worth multiple assets in a potential trade.