According to Ken Rosenthal, the Rockies have talked about bringing in Daniel Murphy, but not to play second base.
Sources: The #Rockies have discussed internally the possibility of signing free agent Daniel Murphy to play first base.— Ken Rosenthal (@Ken_Rosenthal) November 7, 2015
This comes as a bit of a surprise, as Murphy has only played first base in 190 of the 903 games he's played in his career. From a hitting perspective, bringing in Murphy would make sense. The Rockies recently just declined an option on Justin Morneau, leaving a huge hole at first base. Murphy is coming off of a .281/.322/.449 season and a career high in home runs with 14 and a career low 7.1 K%.
However signing Murphy would be a risk. His defense isn't great, as he produced a -1.3 UZR at second base last season. While he hasn't played a ton of first, as mentioned above, he did post a 1.8 UZR at first in 133 innings in 2015. The Rockies have a protected first round pick, meaning they would only forfeit a second round pick in order to sign the second-baseman.
While it is a small sample size of 19 games, Murphy has had success playing in Coors Field. In 86 at-bats, he's hit .313/.337/.475 line with one home run and seven RBI's.