Jose Sandoval sought workers’ compensation benefits for a back and leg injury. An administrative law judge found the injury compensable, found that Sandoval gave proper notice, and awarded benefits, penalties, and attorney fees. The State Board adopted the findings on compensability and notice but removed the fee award, finding that the employer’s defenses were reasonably contested. The superior court reversed that decision, reasoning that the Board had not expressly found the late controvert reasonable. The Court of Appeals reversed the superior court. Under the workers’ compensation statute, the Board’s findings are conclusive when supported by competent evidence, and the superior court’s role is limited to deciding whether the Board’s decision has evidentiary support. The record included evidence concerning Sandoval’s pre-existing back condition and other defenses that the Board found closely contested on reasonable grounds. Because the Board acted within its discretion and did not apply an erroneous legal theory, the superior court erred by substituting its judgment for the Board’s. The Court of Appeals did not reach the employer’s remaining claims.