Martzen's impact is that he promoted roster balance (actually filling needs) and for BYU to look in other states east of Utah. From 2011-2013 before Martzen arrived, BYU only signed one recruit per year east of Utah. BYU signed 11 in 2 years (5.5 average) under Martzen.

2012 class
18 players signed - only one recruit east of Utah (Amone)
14 LDS players and all 14 served missions
1 JC player (Johnson)
3 HS non-LDS players (JLD, Williams, King)
0 Offensive Linemen

2013 class
28 players signed (only one recruit east of Utah (Shoaf)
15 LDS players and 12 served missions (Both Leavitt and Kearsley transferred from the 3 that didn't go)
8 JC players
5 HS non-LDS players (Andersen, Davis, Green, Peoples, Laulile)
8 offensive linemen
8 defensive backs

2014 class
19 players signed (North Carolina, Texas, Kansas, and Alabama recruits)
16 LDS players (9 on missions or bound)
2 JC players (Kurtz, Blackmon)
1 non-LDS HS player (Gulley)

2015 class
22 player signed (6 Texas recruits and one Kentucky recruit and one from Tonga)
15 LDS players (9 mission bound right away)
1 JC player (Takenaka)
6 non-LDS HS players