He amassed La Liga totals of 129 matches and one goal over seven seasons, playing for Oviedo, Real Sociedad and Numancia.
He added 114 appearances in Segunda División, in a 20-year senior career.
[3][4] After appearing in 25 games in the side's runner-up campaign in the league, he played almost no part in the following years, also serving an unassuming loan stint with Córdoba CF (second division) in 2004–05, where he was inclusively ousted from the squad for more than two months.
[5] Released, Boris signed with CD Numancia of the same level,[6] being a key defensive element as the team from Soria returned to the top tier in 2008 after a three-year hiatus.
[7] In June 2011, after a total of 18 league appearances in his last two seasons – just three matches in the latter – the 31-year-old left the Nuevo Estadio Los Pajaritos and returned to his hometown with his very first football club Real Avilés, in the fourth division.