We present here a study of Main Injector proton coalescing efficiency in the period of November 1, 2008 to February 10, 2009. We try to correlate the decrease of the coalescing efficiency with proton intensity, proton longitudinal emittance at 8 GeV, and the multibatch coalescing mode. We study the proton bunch lengths at the Tevatron as well, together with several other proton efficiencies during the same time period.