If you keep moving players around in the lineup whenever they have 40 bad at bats you're going to have a lineup that's constantly changing and then fans complain that the manager isn't putting out a consistent lineup. And Lucroy's career BB% is 6.4. His OBP is going to be tied a lot to his batting average, much more so than Weeks. So if Lucroy has a streak of games where he goes say 8 for 40, his OBP will likely struggle to break .250.