  In this work we present the analysis of the energy spectrum from a recent
two-flavor ($N_f=2$) lattice QCD calculation for pion-pion scattering in the
scalar, isoscalar channel (the $\sigma$-meson). The lattice simulation was
performed for two quark masses corresponding to a pion mass of 315 MeV and 227
MeV. The $\sigma$-meson parameters are extracted using various parametrizations
of the scattering amplitude. The results obtained from a chiral unitary
parametrization are extrapolated to the physical point and read $M_\sigma =(
440^{+10}_{-16}(50) - i\,240(20)(25))$ MeV, where the uncertainties in the
parentheses denote the stochastic and systematic ones. The behavior of the
$\sigma$-meson parameters with increasing pion mass is discussed as well.
