This may sound weird, but this is probably the best thing for Martin.
IMO, while he fights for a living, he's taken too many shots and his lights just go out so easily and he's one of this generation of fighters who I fear will suffer the after effects such as pugilistic dementia due to all the shots he's taken.
Not to say that Grove would've KO'd Martin, but Grove was in my opinion to high of a level fighter for Martin to be fighting. I genuinely fear for his wellbeing when I see him fighting.
This is a far more even-keeled matchup and probably best for everyone's health.
MY MMA RANKINGS
HW Cain JDS Werdum Cormier Barnett Bigfoot Overeem Mir Browne Nelson
LHW Jones Machida Evans Hendo Goose Teixeira Davis Shogun Mousasi Bader
MW ASilva Belfort Weidman Jacare Okami Rockhold Kennedy Consta Bisping Boetsch
WW GSP Hendricks Condit MacDonald Diaz Maia Fitch Kampmann Ellenberger Pyle
LW Bendo Alvarez Grant Melendez Thomson J.Miller Diaz Pettis Chandler dos Anjos Gray
FW Aldo Mendes Curran Lamas Frankie Zombie Cub Lentz Kawajiri Siver