From BA: 

Brethowr is a tall and physical 6-foot-6, 250-pound outfielder with a big swing and lots of pull-side power. He has a low handset in his setup and features an uphill swing that can get a bit lengthy, but he has the strength to send the ball a long way with impressive top-end exit velocities. He slashed .294/.421/.581 in 43 games with 12 home runs—all of which were pulled—and a career-low 16.4% strikeout rate. Brethowr is a definite corner profile who spent time DHing in the past with UC Santa Barbara and Arizona State and he also has limited success with wood bats in the West Coast League and Cape Cod League. The power is his carrying tool.