The theoretical has crossed over into reality. The question that follows: Is it sustainable? Of course not. You can’t expect 150 yards and 2 touchdowns every week. Marlon Mack did, however, see 63% of offensive snaps, putting him in the “weekly-starter” conversation. We’ve long known the second-year back is capable of breaking off big chunks of yardage on any given play. We know he’s an above-average athlete and receiver. And with an improving offensive line and Andrew Luck’s return to form, excitement abounds.

While this might technically be Mack’s arrival, it’s also an opportunity to sell high. His two previous games will likely be the best of the season. In both instances, the Colts scored more than 35 points. Unfortunately, these performances came against the league’s premier wet-paper-bag defenses, the Bills and Raiders.

Throughout Mack’s professional and collegiate career, he’s been willing to sacrifice plays in order to hit the home run. That means a lot of attempts for negative yardage. While his 5.8 YPC suggest he’s doing just fine efficiency-wise, it doesn’t necessarily mean this issue is moot. He ranks 32nd in yards created per carry and has shown poor elusivity overall. Additionally, he’s seen an average of just 4.2 defenders in the box.

The larger sample size indicates that Mack is a guy who will hit big some weeks and drop off the map the next. These two games may be the start of a massive upward trend in the South Florida product’s career trajectory. What I’m saying is “hold your horses”; Mack may be a fine talent, but he has a lot to prove once defenses key in and the quality of competition improves. My gut tells me: Sell high.