Martinelli was the dominant player on Howard County's most dominant team. The senior forward had 15 goals and 11 assists, leading the team in both categories. Martinelli had a goal or an assist in 14 of the team's17 games. He also scored some of the team's biggest goals. Martinelli had two goals in the regional championship victory over River Hill. He also bent a free kick around the wall for the first goal in the county championship game, also against the Hawks. Martinelli has committed to play soccer at Towson.