Spencer Rattler and Jake Haener are embroiled in the New Orleans Saints' most compelling training camp battle. The battle is the epitome of iron sharpening iron, and it heats up the closer we get to the regular season.

Backup quarterback battles don't typically see as much attention, but the Saints are a special case. Derek Carr is the starting quarterback, but the battle feels like more than just being the backup. The feeling is Haener and Rattler are fighting to be the top choice for the heir apparent.

As quarterbacks, there can only be one on the field at a time. Last week, Haener entered the game immediately after Carr then Rattler handled the entire second half. The exact time on the field will be impacted by the first team's usage, but in general, Rattler and Haener should switch roles against the 49ers.

This is typically the case in quarterback battles, so if it doesn't happen, it should be taken as a sign Haener has the edge over Rattler.

The thought process is allow Rattler and Haener showcase their abilities with the same supporting cast. The only way for that to be possible is for them to alternate in the pecking order. Can Haener elevate the third-string offennse? Can Rattler make more plays on  the second team? It's worth trying them out to see. Next week will be the final part of the evaluation. Who's starting between the two young quarterbacks will be telling.

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This article originally appeared on Saints Wire: Spencer Rattler and Jake Haener should switch roles vs. 49ers