Hertzsprung-Russell diagram for the VFTS objects observed in SL 639 (black circles) and Hodge 301 (red, open circles). Also plotted are evolutionary tracks for initial masses of 8, 10, 12, 15, 20, 25 M_⊙ (solid lines), the zero-age main sequence (dashed line), and isochrones (3, 5, 10, 15, 20, and 25 Myr, dotted lines) for the non-rotating models from Brott et al. (2011). The apparent blue straggler in Hodge 301 (VFTS 310) is a late O-type star.