CLEVELAND -- Right-hander Alfredo Simon was an All-Star in the first half of the season, but he hasn't won a game in the second half. Simon was the losing pitcher Monday night in a 7-1 Reds loss to Cleveland.

Simon lasted just five innings, giving up five runs on six hits, with three walks and one strikeout. It was Simon's fourth start since the All-Star break, and he has lost them all.

Simon earned a spot on the National League All-Star team by going 12-3 with a 2.70 ERA in the first half of the season. However, in four starts since the All-Star break, Simon is 0-4 with a 5.06 ERA.

Simon's fade in the second half raises questions on whether he has the endurance to pitch a full season as a starting pitcher after spending most of his career as a reliever. In his four years with the Orioles, Simon was used as both a starter and a reliever.

In 2010, Simon was the Orioles closer, and he was 4-2 with 17 saves. He pitched 49 innings that year. In 2011, the Orioles moved him in to their starting rotation. That year, he started 16 games, pitched 115 innings and was 4-9.

In his first two years with the Reds, 2012 and 2013, he was used as a reliever, but this year he is being tried as a starter. The results were good in the first half of the season, but not so good in the second half.