Granada Flexible Stellar Population Synthesis (FSPS, Conroy et al. 2009) stellar masses (Montero-Dorta et al. 2016) are calculated using the BOSS spectroscopic redshift, Z_NOQSO and u,g,r,i,z photometry by means of broad-band spectral energy distribution (SED) fitting of models based on a grid of templates. The flexibility of the model templates allows for a variety of formation-time scenarios including early formation-time (with and without dust), and a wide range of formation times. Calculations have been carried out for both Salpeter (1955) and Kroupa (2001) initial mass functions.